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Java Native Access Platform
/* Copyright (c) 2007, 2013 Timothy Wall, Markus Karg, All Rights Reserved
*
* The contents of this file is dual-licensed under 2
* alternative Open Source/Free licenses: LGPL 2.1 or later and
* Apache License 2.0. (starting with JNA version 4.0.0).
*
* You can freely decide which license you want to apply to
* the project.
*
* You may obtain a copy of the LGPL License at:
*
* http://www.gnu.org/licenses/licenses.html
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "LGPL2.1".
*
* You may obtain a copy of the Apache License at:
*
* http://www.apache.org/licenses/
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "AL2.0".
*/
package com.sun.jna.platform.win32;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.WinGDI.ICONINFO;
import com.sun.jna.ptr.ByteByReference;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;
/**
* Provides access to the w32 user32 library. Incomplete implementation to
* support demos.
*
* @author Todd Fast, [email protected]
* @author [email protected]
* @author Tobias Wolf, [email protected]
* @author Markus KARG (markus[at]headcrashing[dot]eu)
* @author Andreas "PAX" Lück, onkelpax-git[at]yahoo.de
*/
public interface User32 extends StdCallLibrary, WinUser, WinNT {
/** The instance. */
User32 INSTANCE = Native.load("user32", User32.class, W32APIOptions.DEFAULT_OPTIONS);
/**
* Handle for message-only window.
*/
HWND HWND_MESSAGE = new HWND(Pointer.createConstant(-3));
/** The cs globalclass. */
int CS_GLOBALCLASS = 0x4000;
/** The ws ex topmost. */
int WS_EX_TOPMOST = 0x00000008;
/** The hRecipient parameter is a window handle. */
int DEVICE_NOTIFY_WINDOW_HANDLE = 0x00000000;
/** The hRecipient parameter is a service status handle. */
int DEVICE_NOTIFY_SERVICE_HANDLE = 0x00000001;
/** The device notify all interface classes. */
int DEVICE_NOTIFY_ALL_INTERFACE_CLASSES = 0x00000004;
/**
*
* Sets the show state based on the SW_ value specified in the
* STARTUPINFO
* structure passed to the
* CreateProcess
* function by the program that started the application.
*
*/
int SW_SHOWDEFAULT = 10;
/**
* This function retrieves a handle to a display device context (DC) for the
* client area of the specified window. The display device context can be
* used in subsequent graphics display interface (GDI) functions to draw in
* the client area of the window.
*
* @param hWnd
* Handle to the window whose device context is to be retrieved.
* If this value is NULL, GetDC retrieves the device context for
* the entire screen.
* @return The handle the device context for the specified window's client
* area indicates success. NULL indicates failure. To get extended
* error information, call GetLastError.
*/
HDC GetDC(HWND hWnd);
/**
* This function releases a device context (DC), freeing it for use by other
* applications. The effect of ReleaseDC depends on the type of device
* context.
*
* @param hWnd
* Handle to the window whose device context is to be released.
* @param hDC
* Handle to the device context to be released.
* @return The return value specifies whether the device context is
* released. 1 indicates that the device context is released. Zero
* indicates that the device context is not released.
*/
int ReleaseDC(HWND hWnd, HDC hDC);
/**
* This function retrieves the handle to the top-level window whose class
* name and window name match the specified strings. This function does not
* search child windows.
*
* @param lpClassName
* Long pointer to a null-terminated string that specifies the
* class name or is an atom that identifies the class-name
* string. If this parameter is an atom, it must be a global atom
* created by a previous call to the GlobalAddAtom function. The
* atom, a 16-bit value, must be placed in the low-order word of
* lpClassName; the high-order word must be zero.
* @param lpWindowName
* Long pointer to a null-terminated string that specifies the
* window name (the window's title). If this parameter is NULL,
* all window names match.
* @return A handle to the window that has the specified class name and
* window name indicates success. NULL indicates failure. To get
* extended error information, call GetLastError.
*/
HWND FindWindow(String lpClassName, String lpWindowName);
/**
* This function retrieves the name of the class to which the specified
* window belongs.
*
* @param hWnd
* Handle to the window and, indirectly, the class to which the
* window belongs.
* @param lpClassName
* Long pointer to the buffer that is to receive the class name
* string.
* @param nMaxCount
* Specifies the length, in characters, of the buffer pointed to
* by the lpClassName parameter. The class name string is
* truncated if it is longer than the buffer.
* @return The number of characters copied to the specified buffer indicates
* success. Zero indicates failure. To get extended error
* information, call GetLastError.
*/
int GetClassName(HWND hWnd, char[] lpClassName, int nMaxCount);
/**
* Retrieves information about the active window or a specified graphical
* user interface (GUI) thread.
*
* @param idThread
* Identifies the thread for which information is to be
* retrieved. To retrieve this value, use the
* GetWindowThreadProcessId function. If this parameter is NULL,
* the function returns information for the foreground thread.
* @param lpgui
* Pointer to a GUITHREADINFO structure that receives information
* describing the thread. Note that you must set
* GUITHREADINFO.cbSize to sizeof(GUITHREADINFO) before calling
* this function.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero. To get extended error
* information, call GetLastError.
*/
boolean GetGUIThreadInfo(int idThread, GUITHREADINFO lpgui);
/**
* The GetWindowInfo function retrieves information about the specified
* window.
*
* @param hWnd
* Handle to the window whose information is to be retrieved.
* @param pwi
* Pointer to a WINDOWINFO structure to receive the information.
* Note that you must set WINDOWINFO.cbSize to sizeof(WINDOWINFO)
* before calling this function.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero.
*/
boolean GetWindowInfo(HWND hWnd, WINDOWINFO pwi);
/**
* This function retrieves the dimensions of the bounding rectangle of the
* specified window. The dimensions are given in screen coordinates that are
* relative to the upper-left corner of the screen.
*
* @param hWnd
* Handle to the window.
* @param rect
* Long pointer to a RECT structure that receives the screen
* coordinates of the upper-left and lower-right corners of the
* window.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero.
*/
boolean GetWindowRect(HWND hWnd, RECT rect);
/**
* This function retrieves the coordinates of a window's client area.
* The client coordinates specify the upper-left and lower-right corners of the
* client area. Because client coordinates are relative to the upper-left
* corner of a window's client area, the coordinates of the upper-left corner
* are (0,0).
*
* @param hWnd
* Handle to the window.
* @param rect
* Long pointer to a RECT structure that structure that receives
* the client coordinates. The left and top members are zero. The
* right and bottom members contain the width and height of the
* window.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero.
*/
boolean GetClientRect(HWND hWnd, RECT rect);
/**
* This function copies the text of the specified window's title bar - if it
* has one - into a buffer. If the specified window is a control, the text
* of the control is copied.
*
* @param hWnd
* Handle to the window or control containing the text.
* @param lpString
* Long pointer to the buffer that will receive the text.
* @param nMaxCount
* Specifies the maximum number of characters to copy to the
* buffer, including the NULL character. If the text exceeds this
* limit, it is truncated.
* @return The length, in characters, of the copied string, not including
* the terminating null character, indicates success. Zero indicates
* that the window has no title bar or text, if the title bar is
* empty, or if the window or control handle is invalid. To get
* extended error information, call GetLastError. This function
* cannot retrieve the text of an edit control in another
* application.
*/
int GetWindowText(HWND hWnd, char[] lpString, int nMaxCount);
/**
* This function retrieves the length, in characters, of the specified
* window's title bar text - if the window has a title bar. If the specified
* window is a control, the function retrieves the length of the text within
* the control.
*
* @param hWnd
* Handle to the window or control.
* @return The length, in characters, of the text indicates success. Under
* certain conditions, this value may actually be greater than the
* length of the text. Zero indicates that the window has no text.
* To get extended error information, call GetLastError.
*/
int GetWindowTextLength(HWND hWnd);
/**
* The GetWindowModuleFileName function retrieves the full path and file
* name of the module associated with the specified window handle.
*
* @param hWnd
* Handle to the window whose module file name will be retrieved.
* @param lpszFileName
* Pointer to a buffer that receives the path and file name.
* @param cchFileNameMax
* Specifies the maximum number of TCHARs that can be copied into
* the lpszFileName buffer.
* @return The return value is the total number of TCHARs copied into the
* buffer.
*/
int GetWindowModuleFileName(HWND hWnd, char[] lpszFileName, int cchFileNameMax);
/**
* This function retrieves the identifier of the thread that created the
* specified window and, optionally, the identifier of the process that
* created the window.
*
* @param hWnd
* Handle to the window.
* @param lpdwProcessId
* Pointer to a 32-bit value that receives the process
* identifier. If this parameter is not NULL,
* GetWindowThreadProcessId copies the identifier of the process
* to the 32-bit value; otherwise, it does not.
* @return The return value is the identifier of the thread that created the
* window.
*/
int GetWindowThreadProcessId(HWND hWnd, IntByReference lpdwProcessId);
/**
* This function enumerates all top-level windows on the screen by passing
* the handle to each window, in turn, to an application-defined callback
* function. EnumWindows continues until the last top-level window is
* enumerated or the callback function returns FALSE.
*
* @param lpEnumFunc
* Long pointer to an application-defined callback function.
* @param data
* Specifies an application-defined value to be passed to the
* callback function.
* @return Nonzero indicates success. Zero indicates failure. To get
* extended error information, call GetLastError.
*/
boolean EnumWindows(WNDENUMPROC lpEnumFunc, Pointer data);
/**
* The EnumChildWindows function enumerates the child windows that belong to
* the specified parent window by passing the handle to each child window,
* in turn, to an application-defined callback function. EnumChildWindows
* continues until the last child window is enumerated or the callback
* function returns FALSE.
*
* @param hWnd
* Handle to the parent window whose child windows are to be
* enumerated. If this parameter is NULL, this function is
* equivalent to EnumWindows.
* @param lpEnumFunc
* Pointer to an application-defined callback function.
* @param data
* Specifies an application-defined value to be passed to the
* callback function.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero. To get extended error
* information, call GetLastError. If EnumChildProc returns zero,
* the return value is also zero. In this case, the callback
* function should call SetLastError to obtain a meaningful error
* code to be returned to the caller of EnumChildWindows.
*/
boolean EnumChildWindows(HWND hWnd, WNDENUMPROC lpEnumFunc, Pointer data);
/**
* The EnumThreadWindows function enumerates all nonchild windows associated
* with a thread by passing the handle to each window, in turn, to an
* application-defined callback function. EnumThreadWindows continues until
* the last window is enumerated or the callback function returns FALSE. To
* enumerate child windows of a particular window, use the EnumChildWindows
* function.
*
* @param dwThreadId
* Identifies the thread whose windows are to be enumerated.
* @param lpEnumFunc
* Pointer to an application-defined callback function.
* @param data
* Specifies an application-defined value to be passed to the
* callback function.
* @return If the callback function returns TRUE for all windows in the
* thread specified by dwThreadId, the return value is TRUE. If the
* callback function returns FALSE on any enumerated window, or if
* there are no windows found in the thread specified by dwThreadId,
* the return value is FALSE.
*/
boolean EnumThreadWindows(int dwThreadId, WNDENUMPROC lpEnumFunc, Pointer data);
/**
* The FlashWindowEx function flashes the specified window. It does not
* change the active state of the window.
*
* @param pfwi
* Pointer to the FLASHWINFO structure.
* @return The return value specifies the window's state before the call to
* the FlashWindowEx function. If the window caption was drawn as
* active before the call, the return value is nonzero. Otherwise,
* the return value is zero.
*/
boolean FlashWindowEx(FLASHWINFO pfwi);
/**
* This function loads the specified icon resource from the executable
* (.exe) file associated with an application instance.
*
* @param hInstance
* Handle to an instance of the module whose executable file
* contains the icon to be loaded. This parameter must be NULL
* when a standard icon is being loaded.
* @param iconName
* Long pointer to a null-terminated string that contains the
* name of the icon resource to be loaded. Alternatively, this
* parameter can contain the resource identifier in the low-order
* word and zero in the high-order word. Use the MAKEINTRESOURCE
* macro to create this value.
*
* To use one of the predefined icons, set the hInstance
* parameter to NULL and the lpIconName parameter to one of the
* following values: {@link WinUser#IDC_APPSTARTING} etc.
* @return A handle to the newly loaded icon indicates success. NULL
* indicates failure. To get extended error information, call
* GetLastError.
*/
HICON LoadIcon(HINSTANCE hInstance, String iconName);
/**
* This function loads an icon, cursor, or bitmap.
*
* @param hinst
* Handle to an instance of the module that contains the image to
* be loaded.
* @param name
* Pointer to a null-terminated string that contains the name of
* the image resource in the hinst module that identifies the
* image to load.
* @param type
* Specifies the type of image to be loaded.
* @param xDesired
* Specifies the width, in pixels, of the icon or cursor. If this
* parameter is zero, the function uses the SM_CXICON or
* SM_CXCURSOR system metric value to set the width. If uType is
* IMAGE_BITMAP, this parameter must be zero.
* @param yDesired
* Specifies the height, in pixels, of the icon or cursor. If
* this parameter is zero, the function uses the SM_CYICON or
* SM_CYCURSOR system metric value to set the height. If uType is
* IMAGE_BITMAP, this parameter must be zero.
* @param load
* Set to zero.
* @return The handle of the newly loaded image indicates success. NULL
* indicates failure. To get extended error information, call
* GetLastError.
*/
HANDLE LoadImage(HINSTANCE hinst, String name, int type, int xDesired,
int yDesired, int load);
/**
* This function destroys an icon and frees any memory the icon occupied.
*
* @param hicon
* Handle to the icon to be destroyed. The icon must not be in
* use.
* @return Nonzero indicates success. Zero indicates failure. To get
* extended error information, call GetLastError.
*/
boolean DestroyIcon(HICON hicon);
/**
* This function retrieves information about the specified window.
* GetWindowLong also retrieves the 32-bit (long) value at the specified
* offset into the extra window memory of a window.
*
* @param hWnd
* Handle to the window and, indirectly, the class to which the
* window belongs.
* @param nIndex
* Specifies the zero-based offset to the value to be retrieved.
* @return The requested 32-bit value indicates success. Zero indicates
* failure. To get extended error information, call GetLastError.
*/
int GetWindowLong(HWND hWnd, int nIndex);
/**
* This function changes an attribute of the specified window. SetWindowLong
* also sets a 32-bit (LONG) value at the specified offset into the extra
* window memory of a window.
*
* @param hWnd
* Handle to the window and, indirectly, the class to which the
* window belongs.
* @param nIndex
* Specifies the zero-based offset to the value to be set.
* @param dwNewLong
* Specifies the replacement value.
* @return The previous value of the specified 32-bit integer indicates
* success. Zero indicates failure. To get extended error
* information, call GetLastError.
*/
int SetWindowLong(HWND hWnd, int nIndex, int dwNewLong);
/**
* The GetWindowLongPtr function retrieves information about the specified
* window. The function also retrieves the value at a specified offset into
* the extra window memory.
*
* @param hWnd
* Handle to the window and, indirectly, the class to which the
* window belongs.
* @param nIndex
* Specifies the zero-based offset to the value to be retrieved.
* @return If the function succeeds, the return value is the requested
* value. If the function fails, the return value is zero. To get
* extended error information, call GetLastError. If SetWindowLong
* or SetWindowLongPtr has not been called previously,
* GetWindowLongPtr returns zero for values in the extra window or
* class memory.
*/
LONG_PTR GetWindowLongPtr(HWND hWnd, int nIndex);
/**
* The SetWindowLongPtr function changes an attribute of the specified
* window. The function also sets a value at the specified offset in the
* extra window memory.
*
* @param hWnd
* Handle to the window and, indirectly, the class to which the
* window belongs.
* @param nIndex
* Specifies the zero-based offset to the value to be set.
* @param dwNewLongPtr
* Specifies the replacement value.
* @return If the function succeeds, the return value is the previous value
* of the specified offset. If the function fails, the return value
* is zero. To get extended error information, call GetLastError. If
* the previous value is zero and the function succeeds, the return
* value is zero, but the function does not clear the last error
* information. To determine success or failure, clear the last
* error information by calling SetLastError(0), then call
* SetWindowLongPtr. Function failure will be indicated by a return
* value of zero and a GetLastError result that is nonzero.
*/
Pointer SetWindowLongPtr(HWND hWnd, int nIndex, Pointer dwNewLongPtr);
/**
* The SetLayeredWindowAttributes function sets the opacity and transparency
* color key of a layered window.
*
* @param hwnd
* Handle to the layered window.
* @param crKey
* COLORREF structure that specifies the transparency color key
* to be used when composing the layered window.
* @param bAlpha
* Alpha value used to describe the opacity of the layered
* window.
* @param dwFlags
* Specifies an action to take.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero. To get extended error
* information, call GetLastError.
*/
boolean SetLayeredWindowAttributes(HWND hwnd, int crKey, byte bAlpha, int dwFlags);
/**
* The GetLayeredWindowAttributes function retrieves the opacity and
* transparency color key of a layered window.
*
* @param hwnd
* Handle to the layered window. A layered window is created by
* specifying WS_EX_LAYERED when creating the window with the
* CreateWindowEx function or by setting WS_EX_LAYERED via
* SetWindowLong after the window has been created.
* @param pcrKey
* Pointer to a COLORREF value that receives the transparency
* color key to be used when composing the layered window. All
* pixels painted by the window in this color will be
* transparent. This can be NULL if the argument is not needed.
* @param pbAlpha
* Pointer to a BYTE that receives the Alpha value used to
* describe the opacity of the layered window. Similar to the
* SourceConstantAlpha member of the BLENDFUNCTION structure.
* When the variable referred to by pbAlpha is 0, the window is
* completely transparent. When the variable referred to by
* pbAlpha is 255, the window is opaque. This can be NULL if the
* argument is not needed.
* @param pdwFlags
* Pointer to a DWORD that receives a layering flag. This can be
* NULL if the argument is not needed.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero. To get extended error
* information, call GetLastError.
*/
boolean GetLayeredWindowAttributes(HWND hwnd, IntByReference pcrKey,
ByteByReference pbAlpha, IntByReference pdwFlags);
/**
* The UpdateLayeredWindow function updates the position, size, shape,
* content, and translucency of a layered window.
*
* @param hwnd
* Handle to a layered window. A layered window is created by
* specifying WS_EX_LAYERED when creating the window with the
* CreateWindowEx function.
* @param hdcDst
* Handle to a device context (DC) for the screen. This handle is
* obtained by specifying NULL when calling the function. It is
* used for palette color matching when the window contents are
* updated. If hdcDst isNULL, the default palette will be used.
* If hdcSrc is NULL, hdcDst must be NULL.
* @param pptDst
* Pointer to a POINT structure that specifies the new screen
* position of the layered window. If the current position is not
* changing, pptDst can be NULL.
* @param psize
* Pointer to a SIZE structure that specifies the new size of the
* layered window. If the size of the window is not changing,
* psize can be NULL. If hdcSrc is NULL, psize must be NULL.
* @param hdcSrc
* Handle to a DC for the surface that defines the layered
* window. This handle can be obtained by calling the
* CreateCompatibleDC function. If the shape and visual context
* of the window are not changing, hdcSrc can be NULL.
* @param pptSrc
* Pointer to a POINT structure that specifies the location of
* the layer in the device context. If hdcSrc is NULL, pptSrc
* should be NULL.
* @param crKey
* Pointer to a COLORREF value that specifies the color key to be
* used when composing the layered window. To generate a
* COLORREF, use the RGB macro.
* @param pblend
* Pointer to a BLENDFUNCTION structure that specifies the
* transparency value to be used when composing the layered
* window.
* @param dwFlags
* ULW_* flags.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero. To get extended error
* information, call GetLastError.
*/
boolean UpdateLayeredWindow(HWND hwnd, HDC hdcDst, POINT pptDst,
SIZE psize, HDC hdcSrc, POINT pptSrc, int crKey,
BLENDFUNCTION pblend, int dwFlags);
/**
* This function sets the window region of a window. The window region
* determines the area within the window where the system permits drawing.
* The system does not display any portion of a window that lies outside of
* the window region.
*
* @param hWnd
* Handle to the window whose window region is to be set.
* @param hRgn
* Handle to a region. The function sets the window region of the
* window to this region. If hRgn is NULL, the function sets the
* window region to NULL.
* @param bRedraw
* Specifies whether the system redraws the window after setting
* the window region. If bRedraw is TRUE, the system does so;
* otherwise, it does not. Typically, you set bRedraw to TRUE if
* the window is visible.
* @return Nonzero indicates success. Zero indicates failure. To get
* extended error information, call GetLastError.
*/
int SetWindowRgn(HWND hWnd, HRGN hRgn, boolean bRedraw);
/**
* The GetKeyboardState function copies the status of the 256 virtual keys
* to the specified buffer.
*
* @param lpKeyState
* Pointer to the 256-byte array that receives the status data
* for each virtual key.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero. To get extended error
* information, call GetLastError.
*/
boolean GetKeyboardState(byte[] lpKeyState);
/**
* This function determines whether a key is up or down at the time the
* function is called, and whether the key was pressed after a previous call
* to GetAsyncKeyState.
*
* @param vKey
* Specifies one of 256 possible virtual-key codes.
* @return If the function succeeds, the return value specifies whether the
* key was pressed since the last call to GetAsyncKeyState, and
* whether the key is currently up or down. If the most significant
* bit is set, the key is down.
*/
short GetAsyncKeyState(int vKey);
/**
* The SetWindowsHookEx function installs an application-defined hook
* procedure into a hook chain. You would install a hook procedure to
* monitor the system for certain types of events. These events are
* associated either with a specific thread or with all threads in the same
* desktop as the calling thread.
*
* @param idHook
* Specifies the type of hook procedure to be installed.
* @param lpfn
* Pointer to the hook procedure.
* @param hMod
* Handle to the DLL containing the hook procedure pointed to by
* the lpfn parameter.
* @param dwThreadId
* Specifies the identifier of the thread with which the hook
* procedure is to be associated.
* @return If the function succeeds, the return value is the handle to the
* hook procedure. If the function fails, the return value is NULL.
* To get extended error information, call GetLastError.
*/
HHOOK SetWindowsHookEx(int idHook, HOOKPROC lpfn, HINSTANCE hMod, int dwThreadId);
/**
* The CallNextHookEx function passes the hook information to the next hook
* procedure in the current hook chain. A hook procedure can call this
* function either before or after processing the hook information.
*
* @param hhk
* Ignored.
* @param nCode
* Specifies the hook code passed to the current hook procedure.
* The next hook procedure uses this code to determine how to
* process the hook information.
* @param wParam
* Specifies the wParam value passed to the current hook
* procedure. The meaning of this parameter depends on the type
* of hook associated with the current hook chain.
* @param lParam
* Specifies the lParam value passed to the current hook
* procedure. The meaning of this parameter depends on the type
* of hook associated with the current hook chain.
* @return This value is returned by the next hook procedure in the chain.
* The current hook procedure must also return this value. The
* meaning of the return value depends on the hook type.
*/
LRESULT CallNextHookEx(HHOOK hhk, int nCode, WPARAM wParam, LPARAM lParam);
/**
* The UnhookWindowsHookEx function removes a hook procedure installed in a
* hook chain by the SetWindowsHookEx function.
*
* @param hhk
* Handle to the hook to be removed. This parameter is a hook
* handle obtained by a previous call to SetWindowsHookEx.
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero. To get extended error
* information, call GetLastError.
*/
boolean UnhookWindowsHookEx(HHOOK hhk);
/**
* This function retrieves a message from the calling thread's message queue
* and places it in the specified structure.
*
* @param lpMsg
* Pointer to an MSG structure that receives message information
* from the thread's message queue.
* @param hWnd
* Handle to the window whose messages are to be retrieved. One
* value has a special meaning.
* @param wMsgFilterMin
* Specifies the integer value of the lowest message value to be
* retrieved.
* @param wMsgFilterMax
* Specifies the integer value of the highest message value to be
* retrieved.
* @return If the function retrieves a message other than WM_QUIT, the
* return value is nonzero.
*
* If the function retrieves the WM_QUIT message, the return value is zero.
*
* If there is an error, the return value is -1. For example, the function
* fails if hWnd is an invalid window handle or lpMsg is an invalid pointer.
* To get extended error information, call GetLastError.
*/
int GetMessage(MSG lpMsg, HWND hWnd, int wMsgFilterMin, int wMsgFilterMax);
/**
* This function checks a thread message queue for a message and places the
* message (if any) in the specified structure.
*
* @param lpMsg
* Pointer to an MSG structure that receives message information.
* @param hWnd
* Handle to the window whose messages are to be examined.
* @param wMsgFilterMin
* Specifies the value of the first message in the range of
* messages to be examined.
* @param wMsgFilterMax
* Specifies the value of the last message in the range of
* messages to be examined.
* @param wRemoveMsg
* Specifies how messages are handled. This parameter can be one
* of the following values.
* @return Nonzero indicates success. Zero indicates failure.
*/
boolean PeekMessage(MSG lpMsg, HWND hWnd, int wMsgFilterMin,
int wMsgFilterMax, int wRemoveMsg);
/**
* This function translates virtual-key messages into character messages.
* The character messages are posted to the calling thread's message queue,
* to be read the next time the thread calls the GetMessage or PeekMessage
* function.
*
* @param lpMsg
* Pointer to an MSG structure that contains message information
* retrieved from the calling thread's message queue by using the
* GetMessage or PeekMessage function.
* @return Nonzero indicates that the message is translated, that is, a
* character message is posted to the thread's message queue. If the
* message is WM_KEYDOWN or WM_SYSKEYDOWN, the return value is
* nonzero, regardless of the translation. Zero indicates that the
* message is not translated, that is, a character message is not
* posted to the thread's message queue.
*/
boolean TranslateMessage(MSG lpMsg);
/**
* This function dispatches a message to a window procedure. It is typically
* used to dispatch a message retrieved by the GetMessage function.
*
* @param lpMsg
* Pointer to an MSG structure that contains the message.
* @return The return value specifies the value returned by the window
* procedure. Although its meaning depends on the message being
* dispatched, the return value generally is ignored.
*/
LRESULT DispatchMessage(MSG lpMsg);
/**
* This function places a message in the message queue associated with the
* thread that created the specified window and then returns without waiting
* for the thread to process the message. Messages in a message queue are
* retrieved by calls to the GetMessage or PeekMessage function.
*
* @param hWnd
* Handle to the window whose window procedure is to receive the
* message.
* @param msg
* Specifies the message to be posted.
* @param wParam
* Specifies additional message-specific information.
* @param lParam
* Specifies additional message-specific information.
*/
void PostMessage(HWND hWnd, int msg, WPARAM wParam, LPARAM lParam);
/**
* Posts a message to the message queue of the specified thread. It returns
* without waiting for the thread to process the message.
*
* @param idThread The identifier of the thread to which the message is to
* be posted.
*
* The function fails if the specified thread does not have a
* message queue. The system creates a thread's message queue when the
* thread makes its first call to one of the User or GDI functions.
*
* Message posting is subject to UIPI. The thread of a process can post
* messages only to posted-message queues of threads in processes of lesser
* or equal integrity level.
*
* This thread must have the SE_TCB_NAME privilege to post a message to a
* thread that belongs to a process with the same locally unique identifier
* (LUID) but is in a different desktop. Otherwise, the function fails
* and returns ERROR_INVALID_THREAD_ID.
*
* This thread must either belong to the same desktop as the calling
* thread or to a process with the same LUID. Otherwise, the function
* fails and returns ERROR_INVALID_THREAD_ID.
*
* @param Msg The type of message to be posted.
*
* @param wParam Additional message-specific information.
*
* @param lParam Additional message-specific information.
*
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended error
* information, call GetLastError.
GetLastError returns
* ERROR_INVALID_THREAD_ID if idThread is not a valid thread identifier, or
* if the thread specified by idThread does not have a message queue.
* GetLastError returns ERROR_NOT_ENOUGH_QUOTA when the message limit is hit.
*/
int PostThreadMessage(int idThread, int Msg, WPARAM wParam, LPARAM lParam);
/**
* This function indicates to Windows that a thread has made a request to
* terminate (quit). It is typically used in response to a WM_DESTROY
* message.
*
* @param nExitCode
* Specifies an application exit code. This value is used as the
* wParam parameter of the WM_QUIT message.
*/
void PostQuitMessage(int nExitCode);
/**
* The GetSystemMetrics function retrieves various system metrics (widths
* and heights of display elements) and system configuration settings. All
* dimensions retrieved by GetSystemMetrics are in pixels.
*
* @param nIndex
* System metric or configuration setting to retrieve. This
* parameter can be one of the following values. Note that all
* SM_CX* values are widths and all SM_CY* values are heights.
* Also note that all settings designed to return Boolean data
* represent TRUE as any nonzero value, and FALSE as a zero
* value.
* @return If the function succeeds, the return value is the requested
* system metric or configuration setting. If the function fails,
* the return value is zero. GetLastError does not provide extended
* error information.
*/
int GetSystemMetrics(int nIndex);
/**
* Changes the parent window of the specified child window.
*
* @param hWndChild
* A handle to the child window.
*
* @param hWndNewParent
* A handle to the new parent window. If this parameter is NULL,
* the desktop window becomes the new parent window. If this
* parameter is HWND_MESSAGE, the child window becomes a
* message-only window.
*
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
HWND SetParent(HWND hWndChild, HWND hWndNewParent);
/**
* Determines the visibility state of the specified window.
*
* @param hWnd
* A handle to the window to be tested.
*
* @return If the specified window, its parent window, its parent's parent
* window, and so forth, have the WS_VISIBLE style, the return value
* is nonzero. Otherwise, the return value is zero.
*
* Because the return value specifies whether the window has the
* WS_VISIBLE style, it may be nonzero even if the window is totally
* obscured by other windows.
*/
boolean IsWindowVisible(HWND hWnd);
/**
* Changes the position and dimensions of the specified window. For a
* top-level window, the position and dimensions are relative to the
* upper-left corner of the screen. For a child window, they are relative to
* the upper-left corner of the parent window's client area.
*
* @param hWnd
* A handle to the window.
*
* @param X
* The new position of the left side of the window.
*
* @param Y
* The new position of the top of the window.
*
* @param nWidth
* The new width of the window.
*
* @param nHeight
* The new height of the window.
*
* @param bRepaint
* Indicates whether the window is to be repainted. If this
* parameter is TRUE, the window receives a message. If the
* parameter is FALSE, no repainting of any kind occurs. This
* applies to the client area, the nonclient area (including the
* title bar and scroll bars), and any part of the parent window
* uncovered as a result of moving a child window.
*
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
boolean MoveWindow(HWND hWnd, int X, int Y, int nWidth, int nHeight, boolean bRepaint);
/**
* Changes the size, position, and Z order of a child, pop-up, or top-level
* window. These windows are ordered according to their appearance on the
* screen. The topmost window receives the highest rank and is the first
* window in the Z order.
*
* @param hWnd
* A handle to the window.
*
* @param hWndInsertAfter
* A handle to the window to precede the positioned window in the
* Z order.
*
* @param X
* The new position of the left side of the window, in client
* coordinates.
*
* @param Y
* The new position of the top of the window, in client
* coordinates.
*
* @param cx
* The new width of the window, in pixels.
*
* @param cy
* The new height of the window, in pixels.
*
* @param uFlags
* The window sizing and positioning flags.
*
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
boolean SetWindowPos(HWND hWnd, HWND hWndInsertAfter, int X, int Y, int cx,
int cy, int uFlags);
/**
* Attaches or detaches the input processing mechanism of one thread to that
* of another thread.
*
* @param idAttach
* The identifier of the thread to be attached to another thread.
* The thread to be attached cannot be a system thread.
*
* @param idAttachTo
* The identifier of the thread to which idAttach will be
* attached. This thread cannot be a system thread. A thread
* cannot attach to itself. Therefore, idAttachTo cannot equal
* idAttach.
*
* @param fAttach
* If this parameter is TRUE, the two threads are attached. If
* the parameter is FALSE, the threads are detached.
*
* @return If the function succeeds, the return value is nonzero.
*/
boolean AttachThreadInput(DWORD idAttach, DWORD idAttachTo, boolean fAttach);
/**
* Brings the thread that created the specified window into the foreground
* and activates the window. Keyboard input is directed to the window, and
* various visual cues are changed for the user. The system assigns a
* slightly higher priority to the thread that created the foreground window
* than it does to other threads.
*
* @param hWnd
* A handle to the window that should be activated and brought to
* the foreground.
*
* @return If the window was brought to the foreground, the return value is
* nonzero.
*/
boolean SetForegroundWindow(HWND hWnd);
/**
* Retrieves a handle to the foreground window (the window with which the
* user is currently working). The system assigns a slightly higher priority
* to the thread that creates the foreground window than it does to other
* threads.
*
* @return The return value is a handle to the foreground window. The
* foreground window can be NULL in certain circumstances, such as
* when a window is losing activation.
*/
HWND GetForegroundWindow();
/**
* Sets the keyboard focus to the specified window. The window must be
* attached to the calling thread's message queue.
*
* @param hWnd
* A handle to the window that will receive the keyboard input.
* If this parameter is NULL, keystrokes are ignored.
*
* @return If the function succeeds, the return value is the handle to the
* window that previously had the keyboard focus. If the hWnd
* parameter is invalid or the window is not attached to the calling
* thread's message queue, the return value is NULL. To get extended
* error information, call GetLastError.
*/
HWND SetFocus(HWND hWnd);
/**
* Synthesizes keystrokes, mouse motions, and button clicks.
*
* @param nInputs
* The number of structures in the pInputs array.
*
* @param pInputs
* An array of INPUT structures. Each structure represents an
* event to be inserted into the keyboard or mouse input stream.
*
* @param cbSize
* The size, in bytes, of an INPUT structure. If cbSize is not
* the size of an INPUT structure, the function fails.
*
* @return The function returns the number of events that it successfully
* inserted into the keyboard or mouse input stream. If the function
* returns zero, the input was already blocked by another thread. To
* get extended error information, call GetLastError.
*
* This function fails when it is blocked by UIPI. Note that neither
* GetLastError nor the return value will indicate the failure was
* caused by UIPI blocking.
*/
DWORD SendInput(DWORD nInputs, WinUser.INPUT[] pInputs, int cbSize);
/**
* Waits until the specified process has finished processing its initial
* input and is waiting for user input with no input pending, or until the
* time-out interval has elapsed.
*
* @param hProcess
* A handle to the process. If this process is a console
* application or does not have a message queue, WaitForInputIdle
* returns immediately.
*
* @param dwMilliseconds
* The time-out interval, in milliseconds. If dwMilliseconds is
* INFINITE, the function does not return until the process is
* idle.
*
* @return The following table shows the possible return values for this
* function.
*
* Possible return values
*
* Return code/value
* Description
*
*
* 0
* The wait was satisfied successfully.
*
*
* WAIT_TIMEOUT
* The wait was terminated because the time-out interval
* elapsed.
*
*
* WAIT_FAILED
* An error occurred.
*
*
*/
DWORD WaitForInputIdle(HANDLE hProcess, DWORD dwMilliseconds);
/**
* The InvalidateRect function adds a rectangle to the specified window's
* update region. The update region represents the portion of the window's
* client area that must be redrawn.
*
* @param hWnd
* A handle to the window whose update region has changed. If
* this parameter is NULL, the system invalidates and redraws all
* windows, not just the windows for this application, and sends
* the WM_ERASEBKGND and WM_NCPAINT messages before the function
* returns. Setting this parameter to NULL is not recommended.
*
* @param lpRect
* A pointer to a RECT structure that contains the client
* coordinates of the rectangle to be added to the update region.
* If this parameter is NULL, the entire client area is added to
* the update region.
*
* @param bErase
* Specifies whether the background within the update region is
* to be erased when the update region is processed. If this
* parameter is TRUE, the background is erased when the
* BeginPaint function is called. If this parameter is FALSE, the
* background remains unchanged.
*
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero.
*/
boolean InvalidateRect(HWND hWnd, RECT lpRect, boolean bErase);
/**
* The RedrawWindow function updates the specified rectangle or region in a
* window's client area.
*
* @param hWnd
* A handle to the window to be redrawn. If this parameter is
* NULL, the desktop window is updated.
*
* @param lprcUpdate
* A pointer to a RECT structure containing the coordinates, in
* device units, of the update rectangle. This parameter is
* ignored if the hrgnUpdate parameter identifies a region.
*
* @param hrgnUpdate
* A handle to the update region. If both the hrgnUpdate and
* lprcUpdate parameters are NULL, the entire client area is
* added to the update region.
*
* @param flags
* One or more redraw flags. This parameter can be used to
* invalidate or validate a window, control repainting, and
* control which windows are affected by RedrawWindow.
*
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero.
*/
boolean RedrawWindow(HWND hWnd, RECT lprcUpdate, HRGN hrgnUpdate, DWORD flags);
/**
* Retrieves a handle to a window that has the specified relationship
* (Z-Order or owner) to the specified window.
*
* @param hWnd
* A handle to a window. The window handle retrieved is relative
* to this window, based on the value of the uCmd parameter.
*
* @param uCmd
* The relationship between the specified window and the window
* whose handle is to be retrieved.
*
* @return If the function succeeds, the return value is a window handle. If
* no window exists with the specified relationship to the specified
* window, the return value is NULL. To get extended error
* information, call GetLastError.
*/
HWND GetWindow(HWND hWnd, DWORD uCmd);
/**
* The UpdateWindow function updates the client area of the specified window
* by sending a WM_PAINT message to the window if the window's update region
* is not empty. The function sends a WM_PAINT message directly to the
* window procedure of the specified window, bypassing the application
* queue. If the update region is empty, no message is sent.
*
* @param hWnd
* Handle to the window to be updated.
*
* @return If the function succeeds, the return value is nonzero. If the
* function fails, the return value is zero.
*/
boolean UpdateWindow(HWND hWnd);
/**
* Sets the specified window's show state.
*
* @param hWnd
* A handle to the window.
*
* @param nCmdShow
* Controls how the window is to be shown. This parameter is
* ignored the first time an application calls ShowWindow, if the
* program that launched the application provides a STARTUPINFO
* structure. Otherwise, the first time ShowWindow is called, the
* value should be the value obtained by the WinMain function in
* its nCmdShow parameter.
*
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
boolean ShowWindow(HWND hWnd, int nCmdShow);
/**
* Minimizes (but does not destroy) the specified window.
*
* @param hWnd
* A handle to the window to be minimized.
*
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
boolean CloseWindow(HWND hWnd);
/**
* Defines a system-wide hot key.
*
* @param hWnd
* A handle to the window that will receive
* @param id
* The identifier of the hot key
* @param fsModifiers
* The keys that must be pressed in combination with the key
* specified by the uVirtKey parameter in order to generate the
* @param vk
* The virtual-key code of the hot key
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError}.
* {@link WinUser#WM_HOTKEY} messages generated by the hot key
* {@link WinUser#WM_HOTKEY} message.
* A combination of the following values
*
* - {@link WinUser#MOD_ALT} Either ALT key must be held down.
* - {@link WinUser#MOD_CONTROL} Either CTRL key must be held
* down.
* - {@link WinUser#MOD_NOREPEAT} Changes the hotkey behavior so
* that the keyboard auto-repeat does not yield multiple hotkey
* notifications.
* Windows Vista and Windows XP/2000: This flag is not
* supported.
* - {@link WinUser#MOD_SHIFT} Either SHIFT key must be held down.
*
* - {@link WinUser#MOD_WIN} Either WINDOWS key was held down.
* These keys are labeled with the Windows logo.
*
*/
boolean RegisterHotKey(HWND hWnd, int id, int fsModifiers, int vk);
/**
* Frees a hot key previously registered by the calling thread.
*
* @param hWnd
* A handle to the window associated with the hot key to be
* freed. This parameter should be NULL if the hot key is not
* associated with a window.
*
* @param id
* The identifier of the hot key to be freed.
*
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError}.
*/
boolean UnregisterHotKey(Pointer hWnd, int id);
/**
* Retrieves the time of the last input event.
*
* @param plii
* structure that receives the time of the last input event
* @return If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError}.
*/
boolean GetLastInputInfo(LASTINPUTINFO plii);
/**
* Registers a window class for subsequent use in calls to the CreateWindow
* or CreateWindowEx function.
*
* @param lpwcx
* Type: const WNDCLASSEX* A pointer to a WNDCLASSEX structure.
* You must fill the structure with the appropriate class
* attributes before passing it to the function.
*
* @return If the function succeeds, the return value is a class atom that
* uniquely identifies the class being registered. This atom can
* only be used by the CreateWindow, CreateWindowEx, GetClassInfo,
* GetClassInfoEx, FindWindow, FindWindowEx, and UnregisterClass
* functions and the IActiveIMMap::FilterClientWindows method.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError}.
*/
ATOM RegisterClassEx(WNDCLASSEX lpwcx);
/**
* Unregisters a window class, freeing the memory required for the class.
*
* @param lpClassName
* [in] Type: LPCTSTR
*
* A null-terminated string or a class atom. If lpClassName is a
* string, it specifies the window class name. This class name
* must have been registered by a previous call to the
* RegisterClass or RegisterClassEx function. System classes,
* such as dialog box controls, cannot be unregistered. If this
* parameter is an atom, it must be a class atom created by a
* previous call to the RegisterClass or RegisterClassEx
* function. The atom must be in the low-order word of
* lpClassName; the high-order word must be zero.
*
* @param hInstance
* [in,optional] Type: HINSTANCE A handle to the instance of the
* module that created the class. *
*
* @return Type: BOOL If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError}.
*/
boolean UnregisterClass(String lpClassName, HINSTANCE hInstance);
/**
* Creates an overlapped, pop-up, or child window with an extended window
* style; otherwise, this function is identical to the CreateWindow
* function. For more information about creating a window and for full
* descriptions of the other parameters of CreateWindowEx, see CreateWindow.
*
* @param dwExStyle
* [in] Type: DWORD
*
* The extended window style of the window being created. For a
* list of possible values,see Extended Window Styles.
*
* @param lpClassName
* [in, optional] Type: LPCTSTR
*
* A null-terminated string or a class atom created by a previous
* call to the RegisterClass or RegisterClassEx function. The
* atom must be in the low-order word of lpClassName; the
* high-order word must be zero. If lpClassName is a string, it
* specifies the window class name. The class name can be any
* name registered with RegisterClass or RegisterClassEx,
* provided that the module that registers the class is also the
* module that creates the window. The class name can also be any
* of the predefined system class names.
*
* @param lpWindowName
* [in, optional] Type: LPCTSTR
*
* The window name. If the window style specifies a title bar,
* the window title pointed to by lpWindowName is displayed in
* the title bar. When using CreateWindow to create controls,
* such as buttons, check boxes, and static controls, use
* lpWindowName to specify the text of the control. When creating
* a static control with the SS_ICON style, use lpWindowName to
* specify the icon name or identifier. To specify an identifier,
* use the syntax "#num".
*
* @param dwStyle
* [in] Type: DWORD
*
* The style of the window being created. This parameter can be a
* combination of the window style values, plus the control
* styles indicated in the Remarks section.
*
* @param x
* [in] Type: int
*
* The initial horizontal position of the window. For an
* overlapped or pop-up window, the x parameter is the initial
* x-coordinate of the window's upper-left corner, in screen
* coordinates. For a child window, x is the x-coordinate of the
* upper-left corner of the window relative to the upper-left
* corner of the parent window's client area. If x is set to
* CW_USEDEFAULT, the system selects the default position for the
* window's upper-left corner and ignores the y parameter.
* CW_USEDEFAULT is valid only for overlapped windows; if it is
* specified for a pop-up or child window, the x and y parameters
* are set to zero.
*
* @param y
* [in] Type: int
*
* The initial vertical position of the window. For an overlapped
* or pop-up window, the y parameter is the initial y-coordinate
* of the window's upper-left corner, in screen coordinates. For
* a child window, y is the initial y-coordinate of the
* upper-left corner of the child window relative to the
* upper-left corner of the parent window's client area. For a
* list box y is the initial y-coordinate of the upper-left
* corner of the list box's client area relative to the
* upper-left corner of the parent window's client area.
*
* If an overlapped window is created with the WS_VISIBLE style
* bit set and the x parameter is set to CW_USEDEFAULT, then the
* y parameter determines how the window is shown. If the y
* parameter is CW_USEDEFAULT, then the window manager calls
* ShowWindow with the SW_SHOW flag after the window has been
* created. If the y parameter is some other value, then the
* window manager calls ShowWindow with that value as the
* nCmdShow parameter.
*
* @param nWidth
* [in] Type: int
*
* The width, in device units, of the window. For overlapped
* windows, nWidth is the window's width, in screen coordinates,
* or CW_USEDEFAULT. If nWidth is CW_USEDEFAULT, the system
* selects a default width and height for the window; the default
* width extends from the initial x-coordinates to the right edge
* of the screen; the default height extends from the initial
* y-coordinate to the top of the icon area. CW_USEDEFAULT is
* valid only for overlapped windows; if CW_USEDEFAULT is
* specified for a pop-up or child window, the nWidth and nHeight
* parameter are set to zero.
*
* @param nHeight
* [in] Type: int
*
* The height, in device units, of the window. For overlapped
* windows, nHeight is the window's height, in screen
* coordinates. If the nWidth parameter is set to CW_USEDEFAULT,
* the system ignores nHeight.
*
* @param hWndParent
* [in, optional] Type: HWND
*
* A handle to the parent or owner window of the window being
* created. To create a child window or an owned window, supply a
* valid window handle. This parameter is optional for pop-up
* windows.
*
* To create a message-only window, supply HWND_MESSAGE or a
* handle to an existing message-only window.
*
* @param hMenu
* [in, optional] Type: HMENU
*
* A handle to a menu, or specifies a child-window identifier,
* depending on the window style. For an overlapped or pop-up
* window, hMenu identifies the menu to be used with the window;
* it can be NULL if the class menu is to be used. For a child
* window, hMenu specifies the child-window identifier, an
* integer value used by a dialog box control to notify its
* parent about events. The application determines the
* child-window identifier; it must be unique for all child
* windows with the same parent window.
*
* @param hInstance
* [in, optional] Type: HINSTANCE
*
* A handle to the instance of the module to be associated with
* the window.
*
* @param lpParam
* [in, optional] Type: LPVOID
*
* Pointer to a value to be passed to the window through the
* CREATESTRUCT structure (lpCreateParams member) pointed to by
* the lParam param of the WM_CREATE message. This message is
* sent to the created window by this function before it returns.
*
* If an application calls CreateWindow to create a MDI client
* window, lpParam should point to a CLIENTCREATESTRUCT
* structure. If an MDI client window calls CreateWindow to
* create an MDI child window, lpParam should point to a
* MDICREATESTRUCT structure. lpParam may be NULL if no
* additional data is needed.
*
* @return Type: HWND
*
* If the function succeeds, the return value is a handle to the new
* window.
*
* If the function fails, the return value is NULL. To get extended
* error information, call GetLastError.
*
* This function typically fails for one of the following reasons:
*
* - an invalid parameter value
* - the system class was registered by a different module
* - The WH_CBT hook is installed and returns a failure code
* - if one of the controls in the dialog template is not registered,
* or its window window procedure fails WM_CREATE or
* WM_NCCREATE
*
*/
HWND CreateWindowEx(int dwExStyle, String lpClassName,
String lpWindowName, int dwStyle, int x, int y, int nWidth,
int nHeight, HWND hWndParent, HMENU hMenu, HINSTANCE hInstance,
LPVOID lpParam);
/**
* Destroys the specified window. The function sends WM_DESTROY and
* WM_NCDESTROY messages to the window to deactivate it and remove the
* keyboard focus from it. The function also destroys the window's menu,
* flushes the thread message queue, destroys timers, removes clipboard
* ownership, and breaks the clipboard viewer chain (if the window is at the
* top of the viewer chain).
*
* If the specified window is a parent or owner window, DestroyWindow
* automatically destroys the associated child or owned windows when it
* destroys the parent or owner window. The function first destroys child or
* owned windows, and then it destroys the parent or owner window.
*
* DestroyWindow also destroys modeless dialog boxes created by the
* CreateDialog function.
*
* @param hWnd
* [in] Type: HWND A handle to the window to be destroyed.
*
* @return Type: BOOL If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError}.
*/
boolean DestroyWindow(HWND hWnd);
/**
* Retrieves information about a window class, including a handle to the
* small icon associated with the window class. The GetClassInfo function
* does not retrieve a handle to the small icon.
*
* @param hinst
* [in, optional] Type: HINSTANCE
*
* A handle to the instance of the application that created the
* class. To retrieve information about classes defined by the
* system (such as buttons or list boxes), set this parameter to
* NULL.
*
* @param lpszClass
* [in] Type: LPCTSTR
*
* The class name. The name must be that of a preregistered class
* or a class registered by a previous call to the RegisterClass
* or RegisterClassEx function. Alternatively, this parameter can
* be a class atom created by a previous call to RegisterClass or
* RegisterClassEx. The atom must be in the low-order word of
* lpszClass; the high-order word must be zero.
*
* @param lpwcx
* [out] Type: LPWNDCLASSEX
*
* A pointer to a WNDCLASSEX structure that receives the
* information about the class.
*
* @return Type: BOOL If the function finds a matching class and
* successfully copies the data, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError} .
*/
boolean GetClassInfoEx(HINSTANCE hinst, String lpszClass, WNDCLASSEX lpwcx);
/**
* Calls the default window procedure to provide default processing for any
* window messages that an application does not process. This function
* ensures that every message is processed. DefWindowProc is called with the
* same parameters received by the window procedure.
*
* @param hWnd
* [in] Type: HWND
*
* A handle to the window procedure that received the message.
*
* @param Msg
* [in] Type: UINT
*
* The message.
*
* @param wParam
* [in] Type: WPARAM
*
* Additional message information. The content of this parameter
* depends on the value of the Msg parameter.
*
* @param lParam
* [in] Type: LPARAM
*
* Additional message information. The content of this parameter
* depends on the value of the Msg parameter.
*
* @return Type: LRESULT The return value is the result of the message
* processing and depends on the message.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError}.
*/
LRESULT DefWindowProc(HWND hWnd, int Msg, WPARAM wParam, LPARAM lParam);
/**
* Registers the device or type of device for which a window will receive
* notifications.
*
* @param hRecipient [in] A handle to the window or service that will receive
* device events for the devices specified in the
* NotificationFilter parameter. The same window handle can be
* used in multiple calls to RegisterDeviceNotification.
*
* Services can specify either a window handle or service status
* handle.
*
* @param notificationFilter
* [in] A pointer to a block of data that specifies the type of
* device for which notifications should be sent. This block
* always begins with the DEV_BROADCAST_HDR structure. The data
* following this header is dependent on the value of the
* dbch_devicetype member, which can be
* DBT_DEVTYP_DEVICEINTERFACE or DBT_DEVTYP_HANDLE. For more
* information, see Remarks.
*
* @param Flags
* [in] This parameter can be one of the following values.
* DEVICE_NOTIFY_WINDOW_HANDLE0x00000000 The hRecipient parameter
* is a window handle.
*
* DEVICE_NOTIFY_SERVICE_HANDLE0x00000001 The hRecipient
* parameter is a service status handle.
*
* In addition, you can specify the following value.
*
* DEVICE_NOTIFY_ALL_INTERFACE_CLASSES0x00000004 Notifies the
* recipient of device interface events for all device interface
* classes. (The dbcc_classguid member is ignored.)
*
* This value can be used only if the dbch_devicetype member is
* DBT_DEVTYP_DEVICEINTERFACE.
*
* @return value
*
* If the function succeeds, the return value is a device
* notification handle.
*
* If the function fails, the return value is NULL. To get extended
* error information, call GetLastError.
*/
HDEVNOTIFY RegisterDeviceNotification(HANDLE hRecipient, Structure notificationFilter, int Flags);
/**
* Closes the specified device notification handle.
*
* @param Handle [in] Device notification handle returned by the
* RegisterDeviceNotification function.
*
* @return Return value
*
* If the function succeeds, the return value is nonzero.
*
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
boolean UnregisterDeviceNotification(HDEVNOTIFY Handle);
/**
* Defines a new window message that is guaranteed to be unique throughout the system.
* The message value can be used when sending or posting messages.
*
* @param string
* The message to be registered.
*
* @return If the message is successfully registered, the return value is a message identifier in the range 0xC000 through 0xFFFF.
*
* If the function fails, the return value is zero. To get extended error information, call GetLastError.
*
*/
int RegisterWindowMessage(String string);
/**
* Retrieves a handle to the display monitor that contains a specified point.
* @param pt A POINT structure that specifies the point of interest in virtual-screen
* coordinates.
* @param dwFlags Determines the function's return value if the window does not intersect
* any display monitor. This parameter can be one of the following values.
* - MONITOR_DEFAULTTONEAREST
* - MONITOR_DEFAULTTONULL
* - MONITOR_DEFAULTTOPRIMARY
* @return If the point is contained by a display monitor, the return value is an HMONITOR
* handle to that display monitor. If the point is not contained by a display monitor,
* the return value depends on the value of dwFlags.
*/
HMONITOR MonitorFromPoint(POINT.ByValue pt, int dwFlags);
/**
* Retrieves a handle to the display monitor that has the largest area of intersection with
* a specified rectangle.
* @param lprc A pointer to a RECT structure that specifies the rectangle of interest in
* virtual-screen coordinates.
* @param dwFlags Determines the function's return value if the window does not intersect
* any display monitor. This parameter can be one of the following values.
* - MONITOR_DEFAULTTONEAREST
* - MONITOR_DEFAULTTONULL
* - MONITOR_DEFAULTTOPRIMARY
* @return If the rectangle intersects one or more display monitor rectangles, the return
* value is an HMONITOR handle to the display monitor that has the largest area of
* intersection with the rectangle. If the rectangle does not intersect a display
* monitor, the return value depends on the value of dwFlags.
*/
HMONITOR MonitorFromRect(RECT lprc, int dwFlags);
/**
* Retrieves a handle to the display monitor that has the largest area of intersection with
* the bounding rectangle of a specified window.
*
* If the window is currently minimized, MonitorFromWindow uses the rectangle of the window
* before it was minimized.
* @param hwnd A handle to the window of interest.
* @param dwFlags Determines the function's return value if the window does not intersect
* any display monitor. This parameter can be one of the following values.
* - MONITOR_DEFAULTTONEAREST
* - MONITOR_DEFAULTTONULL
* - MONITOR_DEFAULTTOPRIMARY
* @return If the window intersects one or more display monitor rectangles, the return value
* is an HMONITOR handle to the display monitor that has the largest area of
* intersection with the window. If the window does not intersect a display monitor,
* the return value depends on the value of dwFlags.
*/
HMONITOR MonitorFromWindow(HWND hwnd, int dwFlags);
/**
* Retrieves information about a display monitor.
* @param hMonitor A handle to the display monitor of interest.
* @param lpmi A pointer to a {@link WinUser.MONITORINFO} structure that receives information about
* the specified display monitor.
* @return If the function succeeds, the return value is nonzero. If the function
* fails, the return value is zero.
*/
BOOL GetMonitorInfo(HMONITOR hMonitor, MONITORINFO lpmi);
/**
* Retrieves information about a display monitor.
* @param hMonitor A handle to the display monitor of interest.
* @param lpmi A pointer to a {@link WinUser.MONITORINFOEX} structure that receives information about
* the specified display monitor.
* @return If the function succeeds, the return value is nonzero. If the function
* fails, the return value is zero.
*/
BOOL GetMonitorInfo(HMONITOR hMonitor, MONITORINFOEX lpmi);
/**
* Enumerates display monitors (including invisible pseudo-monitors associated with the mirroring drivers)
* that intersect a region formed by the intersection of a specified clipping rectangle and the visible
* region of a device context. EnumDisplayMonitors calls an application-defined MonitorEnumProc callback
* function once for each monitor that is enumerated. Note that GetSystemMetrics (SM_CMONITORS) counts
* only the display monitors.
*
* @param hdc A handle to a display device context that defines the visible region of interest. If this
* parameter is NULL, the hdcMonitor parameter passed to the callback function will be NULL, and
* the visible region of interest is the virtual screen that encompasses all the displays on the
* desktop.
* @param lprcClip A pointer to a RECT structure that specifies a clipping rectangle. The region of
* interest is the intersection of the clipping rectangle with the visible region specified by hdc.
* If hdc is non-NULL, the coordinates of the clipping rectangle are relative to the origin of the
* hdc. If hdc is NULL, the coordinates are virtual-screen coordinates. This parameter can be NULL
* if you don't want to clip the region specified by hdc.
* @param lpfnEnum A pointer to an application-defined callback function.
* @param dwData Application-defined data that EnumDisplayMonitors passes directly to the lpfnEnum function.
* @return If the function succeeds, the return value is nonzero. If the function fails, the return value
* is zero.
*/
BOOL EnumDisplayMonitors(HDC hdc, RECT lprcClip, MONITORENUMPROC lpfnEnum, LPARAM dwData);
/**
* Retrieves the show state and the restored, minimized, and maximized
* positions of the specified window.
*
* @param hwnd A handle to the window.
* @param lpwndpl A pointer to the WINDOWPLACEMENT structure that receives the
* show state and position information.
* @return The number of characters copied to the specified buffer indicates
* success. Zero indicates failure. To get extended error
* information, call GetLastError.
*/
BOOL GetWindowPlacement(HWND hwnd, WINDOWPLACEMENT lpwndpl);
/**
* Sets the show state and the restored, minimized, and maximized positions
* of the specified window.
*
* @param hwnd A handle to the window.
* @param lpwndpl A pointer to a WINDOWPLACEMENT structure that specifies the
* new show state and window positions.
* @return The number of characters copied to the specified buffer indicates
* success. Zero indicates failure. To get extended error
* information, call GetLastError.
*/
BOOL SetWindowPlacement(HWND hwnd, WINDOWPLACEMENT lpwndpl);
/**
* Calculates the required size of the window rectangle, based on the desired
* client-rectangle size. The window rectangle can then be passed to the CreateWindow
* function to create a window whose client area is the desired size.
*
* To specify an extended window style, use the AdjustWindowRectEx function.
*
* A client rectangle is the smallest rectangle that completely encloses a
* client area. A window rectangle is the smallest rectangle that completely
* encloses the window, which includes the client area and the nonclient area.
*
* The AdjustWindowRect function does not add extra space when a menu bar wraps
* to two or more rows.
*
* The AdjustWindowRect function does not take the WS_VSCROLL or WS_HSCROLL
* styles into account. To account for the scroll bars, call the GetSystemMetrics
* function with SM_CXVSCROLL or SM_CYHSCROLL.
*
* @param lpRect A pointer to a RECT structure that contains the coordinates
* of the top-left and bottom-right corners of the desired client area.
* When the function returns, the structure contains the coordinates
* of the top-left and bottom-right corners of the window to accommodate
* the desired client area.
* @param dwStyle The window style of the window whose required size is to be
* calculated. Note that you cannot specify the WS_OVERLAPPED style.
* @param bMenu Indicates whether the window has a menu.
* @return The number of characters copied to the specified buffer indicates
* success. Zero indicates failure. To get extended error
* information, call GetLastError.
*/
BOOL AdjustWindowRect(RECT lpRect, DWORD dwStyle, BOOL bMenu);
/**
* Calculates the required size of the window rectangle, based on the desired
* client-rectangle size. The window rectangle can then be passed to the CreateWindowEx
* function to create a window whose client area is the desired size.
*
* A client rectangle is the smallest rectangle that completely encloses a
* client area. A window rectangle is the smallest rectangle that completely
* encloses the window, which includes the client area and the nonclient area.
*
* The AdjustWindowRectEx function does not add extra space when a menu bar wraps
* to two or more rows.
*
* The AdjustWindowRectEx function does not take the WS_VSCROLL or WS_HSCROLL
* styles into account. To account for the scroll bars, call the GetSystemMetrics
* function with SM_CXVSCROLL or SM_CYHSCROLL.
*
* @param lpRect A pointer to a RECT structure that contains the coordinates
* of the top-left and bottom-right corners of the desired client area.
* When the function returns, the structure contains the coordinates
* of the top-left and bottom-right corners of the window to accommodate
* the desired client area.
* @param dwStyle The window style of the window whose required size is to be
* calculated. Note that you cannot specify the WS_OVERLAPPED style.
* @param bMenu Indicates whether the window has a menu.
* @param dwExStyle The extended window style of the window whose required size
* is to be calculated.
* @return The number of characters copied to the specified buffer indicates
* success. Zero indicates failure. To get extended error
* information, call GetLastError.
*/
BOOL AdjustWindowRectEx(RECT lpRect, DWORD dwStyle, BOOL bMenu, DWORD dwExStyle);
/**
* Logs off the interactive user, shuts down the system, or shuts down and restarts
* the system. It sends the WM_QUERYENDSESSION message to all applications to
* determine if they can be terminated.
*
* When this function is called, the caller must specify whether or not applications
* with unsaved changes should be forcibly closed. If the caller chooses not to force
* these applications to close and an application with unsaved changes is running on
* the console session, the shutdown will remain in progress until the user logged
* into the console session aborts the shutdown, saves changes, closes the application,
* or forces the application to close. During this period, the shutdown may not be
* aborted except by the console user, and another shutdown may not be initiated.
*
* Calling this function with the value of the uFlags parameter set to EWX_FORCE avoids
* this situation. Remember that doing this may result in loss of data.
*
* To set a shutdown priority for an application relative to other applications in the
* system, use the SetProcessShutdownParameters function.
*
* During a shutdown or log-off operation, running applications are allowed a specific
* amount of time to respond to the shutdown request. If this time expires before all
* applications have stopped, the system displays a user interface that allows the user
* to forcibly shut down the system or to cancel the shutdown request. If the EWX_FORCE
* value is specified, the system forces running applications to stop when the time expires.
*
* If the EWX_FORCEIFHUNG value is specified, the system forces hung applications to close
* and does not display the dialog box.
*
* Console processes receive a separate notification message, CTRL_SHUTDOWN_EVENT or
* CTRL_LOGOFF_EVENT, as the situation warrants. A console process routes these messages
* to its HandlerRoutine function. ExitWindowsEx sends these notification messages
* asynchronously; thus, an application cannot assume that the console notification messages
* have been handled when a call to ExitWindowsEx returns.
*
* To shut down or restart the system, the calling process must use the {@link com.sun.jna.platform.win32.Advapi32#AdjustTokenPrivileges}
* function to enable the SE_SHUTDOWN_NAME privilege. For more information, see Running with Special Privileges.
*
* @param uFlags The shutdown type. This parameter must include one of EWX_HYBRID_SHUTDOWN,
* EWX_LOGOFF, EWX_POWEROFF, EWX_REBOOT, EWX_RESTARTAPPS, or EWX_SHUTDOWN. This
* parameter can optionally include one of EWX_FORCE or EWX_FORCEIFHUNG.
* @param dReason The reason for initiating the shutdown. This parameter must be one
* of the system shutdown reason codes. If this parameter is zero, the
* SHTDN_REASON_FLAG_PLANNED reason code will not be set and therefore the
* default action is an undefined shutdown that is logged as "No title for
* this reason could be found". By default, it is also an unplanned shutdown.
* Depending on how the system is configured, an unplanned shutdown triggers
* the creation of a file that contains the system state information, which
* can delay shutdown. Therefore, do not use zero for this parameter.
* @return If the function succeeds, the return value is nonzero. Because the function
* executes asynchronously, a nonzero return value indicates that the shutdown has been
* initiated. It does not indicate whether the shutdown will succeed. It is possible
* that the system, the user, or another application will abort the shutdown. If the
* function fails, the return value is zero. To get extended error information, call GetLastError.
*/
BOOL ExitWindowsEx(UINT uFlags, DWORD dReason);
/**
* Locks the workstation's display. Locking a workstation protects it from unauthorized use. The
* LockWorkStation function is callable only by processes running on the interactive desktop.
* In addition, the user must be logged on, and the workstation cannot already be locked.
*
* @return If the function succeeds, the return value is nonzero. Because the function executes
* asynchronously, a nonzero return value indicates that the operation has been initiated.
* It does not indicate whether the workstation has been successfully locked. If the
* function fails, the return value is zero. To get extended error information, call GetLastError.
*/
BOOL LockWorkStation();
/**
* Retrieves information about the specified icon or cursor.
*
* @param hIcon
* A handle to the icon or cursor.
*
* To retrieve information about a standard icon or cursor,
* specify one of the following values and use the
* MAKEINTRESOURCE macro to create this value:
* {@link WinUser#IDC_APPSTARTING} etc.
* @param piconinfo
* A pointer to an ICONINFO structure. The function fills in the
* structure's members.
* @return If the function succeeds, the return value is {@code true} and
* the function fills in the members of the specified ICONINFO
* structure.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError()}.
*/
boolean GetIconInfo(HICON hIcon, ICONINFO piconinfo);
/**
* Sends the specified message to one or more windows.
*
* @param hWnd
* A handle to the window whose window procedure will receive the
* message.
*
* If this parameter is HWND_BROADCAST ((HWND)0xffff), the
* message is sent to all top-level windows in the system,
* including disabled or invisible unowned windows. The function
* does not return until each window has timed out. Therefore,
* the total wait time can be up to the value of uTimeout
* multiplied by the number of top-level windows.
* @param msg
* The message to be sent.
* @param wParam
* Any additional message-specific information.
* @param lParam
* Any additional message-specific information.
* @param fuFlags
* The behavior of this function. This parameter can be one or
* more of the following values: {@link WinUser#SMTO_ABORTIFHUNG}
* etc.
* @param uTimeout
* The duration of the time-out period, in milliseconds. If the
* message is a broadcast message, each window can use the full
* time-out period. For example, if you specify a five second
* time-out period and there are three top-level windows that
* fail to process the message, you could have up to a 15 second
* delay.
* @param lpdwResult
* The result of the message processing. The value of this
* parameter depends on the message that is specified.
* @return If the function succeeds, the return value is nonzero.
* SendMessageTimeout does not provide information about individual
* windows timing out if HWND_BROADCAST is used.
*
* If the function fails or times out, the return value is 0. To get
* extended error information, call GetLastError. If GetLastError
* returns ERROR_TIMEOUT, then the function timed out.
*
* Windows 2000: If {@link Kernel32#GetLastError()} returns 0, then
* the function timed out.
*/
LRESULT SendMessageTimeout(HWND hWnd, int msg, WPARAM wParam, LPARAM lParam,
int fuFlags, int uTimeout, DWORDByReference lpdwResult);
/**
* Retrieves the specified value from the WNDCLASSEX structure associated
* with the specified window.
*
* @param hWnd
* A handle to the window and, indirectly, the class to which the
* window belongs.
* @param nIndex
* The value to be retrieved. To retrieve a value from the extra
* class memory, specify the positive, zero-based byte offset of
* the value to be retrieved. Valid values are in the range zero
* through the number of bytes of extra class memory, minus
* eight; for example, if you specified 24 or more bytes of extra
* class memory, a value of 16 would be an index to the third
* integer.To retrieve any other value from the WNDCLASSEX
* structure, specify one of the following values:
* {@link WinUser#GCW_ATOM} etc.
* @return If the function succeeds, the return value is the requested
* value.
*
* If the function fails, the return value is zero. To get extended
* error information, call {@link Kernel32#GetLastError()}.
*/
ULONG_PTR GetClassLongPtr(HWND hWnd, int nIndex);
/**
* @param pRawInputDeviceList
* An array of {@link WinUser.RAWINPUTDEVICELIST} structures for the devices
* attached to the system. If (@code null}, the number of devices is
* returned in puiNumDevices
* @param puiNumDevices
* If pRawInputDeviceList is {@code null}, the function populates
* this variable with the number of devices attached to the system;
* otherwise, this variable specifies the number of {@link WinUser.RAWINPUTDEVICELIST}
* structures that can be contained in the buffer to which pRawInputDeviceList
* points. If this value is less than the number of devices attached to
* the system, the function returns the actual number of devices in this
* variable and fails with ERROR_INSUFFICIENT_BUFFER.
* @param cbSize
* The size of a {@link WinUser.RAWINPUTDEVICELIST} structure, in bytes.
* @return If the function is successful, the return value is the number of devices
* stored in the buffer pointed to by pRawInputDeviceList. On
* any other error, the function returns -1 and {@code GetLastError}
* returns the error indication.
* @see WinUser.RAWINPUTDEVICELIST#sizeof()
* @see GetRawInputDeviceList
*/
int GetRawInputDeviceList(RAWINPUTDEVICELIST[] pRawInputDeviceList, IntByReference puiNumDevices, int cbSize);
/**
* Retrieves a handle to the desktop window. The desktop window covers the
* entire screen. The desktop window is the area on top of which other
* windows are painted.
*
* @return Type: HWND The return value is a handle to the desktop window.
*/
HWND GetDesktopWindow();
/**
* The PrintWindow function copies a visual window into the specified device
* context (DC), typically a printer DC.
*
* @param hWnd
* A handle to the window that will be copied.
* @param dest
* A handle to the destination device context.
* @param flags
* The drawing options. It can be one of the following values:
*
* PW_CLIENTONLY:
* Only the client area of the window is copied to hdcBlt. By
* default, the entire window is copied.
* @return If the function succeeds, it returns true (MSDN: a nonzero
* value). If the function fails, it returns false (MSDN: zero).
*/
boolean PrintWindow(HWND hWnd, HDC dest, int flags);
/**
* Determines whether the specified window is enabled for mouse and keyboard
* input.
*
* @param hWnd
* A handle to the window to be tested.
* @return If the window is enabled, the return value is true (nonzero).
* If the window is not enabled, the return value is false (zero).
*/
boolean IsWindowEnabled(HWND hWnd);
/**
* Determines whether the specified window handle identifies an existing
* window.
* A thread should not use IsWindow for a window that it did not create
* because the window could be destroyed after this function was called.
* Further, because window handles are recycled the handle could even point
* to a different window.
*
* @param hWnd
* A handle to the window to be tested.
* @return If the window handle identifies an existing window, the return
* value is true (nonzero).
* If the window handle does not identify an existing window, the
* return value is false (zero).
*/
boolean IsWindow(HWND hWnd);
/**
* @param parent
* Type: HWND
* A handle to the parent window whose child windows are to be
* searched.
* If hwndParent is NULL, the function
* uses the desktop window as the parent window. The function
* searches among windows that are child windows of the desktop.
*
* If hwndParent is HWND_MESSAGE, the
* function searches all
* message-only windows.
* @param child
* Type: HWND
* A handle to a child window. The search begins with the next
* child window in the Z order. The child window must be a direct
* child window of hwndParent, not just a descendant
* window.
* If hwndChildAfter is NULL, the
* search begins with the first child window of
* hwndParent.
* Note that if both hwndParent and
* hwndChildAfter are NULL, the
* function searches all top-level and message-only windows.
* @param className
* Type: LPCTSTR
* The class name or a class atom created by a previous call to
* the
* RegisterClass
* or
* RegisterClassEx
* function. The atom must be placed in the
* low-order word of lpszClass; the high-order word must
* be zero.
* If lpszClass is a string, it specifies the window
* class name. The class name can be any name registered with
*
* RegisterClass
* or
* RegisterClassEx
* , or any of the predefined control-class names,
* or it can be MAKEINTATOM(0x8000). In this latter
* case, 0x8000 is the atom for a menu class. For more
* information, see the Remarks section of this topic.
* @param window
* Type: LPCTSTR
* The window name (the window's title). If this parameter is
* NULL, all window names match.
* @return If the function succeeds, the return value is a handle to the
* window that has the specified class and window names.
* If the function fails, the return value is NULL. To get extended
* error information, call GetLastError.
*/
HWND FindWindowEx(HWND parent, HWND child, String className, String window);
/**
* Retrieves the handle to the ancestor of the specified window.
*
* @param hwnd
* A handle to the window whose ancestor is to be retrieved. If
* this parameter is the desktop window, the function returns
* NULL.
* @param gaFlags
* The ancestor to be retrieved. This parameter can be one of the
* following values:
*
* - GA_PARENT (1) -- Retrieves the parent window. This does
* not include the owner, as it does with the GetParent function.
*
* - GA_ROOT (2) -- Retrieves the root window by walking the
* chain of parent windows..
* - GA_ROOTOWNER (3) -- Retrieves the owned root window by
* walking the chain of parent and owner windows returned by
* GetParent..
*
* @return The return value is the handle to the ancestor window.
*/
HWND GetAncestor(HWND hwnd, int gaFlags);
/**
* Retrieves the position of the mouse cursor, in screen coordinates.
*
* @param p
* lpPoint [out]
* Type: LPPOINT
* A pointer to a POINT structure that receives the screen
* coordinates of the cursor.
* @return Type: BOOL.
* Returns nonzero if successful or zero otherwise. To get extended
* error information, call GetLastError.
*/
boolean GetCursorPos(POINT p);
/**
* Moves the cursor to the specified screen coordinates.
* If the new coordinates are not within the screen rectangle set by the
* most recent ClipCursor function call, the system automatically adjusts
* the coordinates so that the cursor stays within the rectangle.
*
* @param x
* The new x-coordinate of the cursor, in screen coordinates.
* @param y
* The new y-coordinate of the cursor, in screen coordinates.
* @return Type: BOOL.
* Returns nonzero if successful or zero otherwise. To get extended
* error information, call GetLastError.
*/
boolean SetCursorPos(long x, long y);
/**
* @param eventMin
* Type: UINT
* Specifies the event constant for the lowest event value in the
* range of events that are handled by the hook function.
* This parameter can be set to EVENT_MIN to indicate the lowest
* possible event value.
* @param eventMax
* Type: UINT
* Specifies the event constant for the highest event value in
* the range of events that are handled by the hook function.
* This parameter can be set to EVENT_MAX to indicate the highest
* possible event value.
* @param hmodWinEventProc
* Type: HMODULE
* Handle to the DLL that contains the hook function at
* lpfnWinEventProc, if the WINEVENT_INCONTEXT flag is specified
* in the dwFlags parameter.
* If the hook function is not located in a DLL, or if the
* WINEVENT_OUTOFCONTEXT flag is specified, this parameter is
* NULL.
* @param winEventProc
* Type: WINEVENTPROC
* Pointer to the event hook function. For more information about
* this function, see WinEventProc.
* @param processID
* Type: DWORD
* Specifies the ID of the process from which the hook function
* receives events.
* Specify zero (0) to receive events from all processes on the
* current desktop.
* @param threadID
* Type: DWORD
* Specifies the ID of the thread from which the hook function
* receives events.
* If this parameter is zero, the hook function is associated
* with all existing threads on the current desktop.
* @param flags
* Type: UINT
* Flag values that specify the location of the hook function and
* of the events to be skipped.
* The following flags are valid:
*
* - WINEVENT_INCONTEXT: The DLL that contains the
* callback function is mapped into the address space of the
* process that generates the event.
* With this flag, the system sends event notifications to the
* callback function as they occur.
* The hook function must be in a DLL when this flag is
* specified.
* This flag has no effect when both the calling process and the
* generating process are not 32-bit or 64-bit processes, or when
* the generating process is a console application.
* For more information, see In-Context Hook Functions.
* - WINEVENT_OUTOFCONTEXT: The callback function is not
* mapped into the address space of the process that generates
* the event.
* Because the hook function is called across process boundaries,
* the system must queue events.
* Although this method is asynchronous, events are guaranteed to
* be in sequential order.
* For more information, see Out-of-Context Hook Functions.
* - WINEVENT_SKIPOWNPROCESS:
* Prevents this instance of the hook from receiving the events
* that are generated by threads in this process.
* This flag does not prevent threads from generating events.
*
* - WINEVENT_SKIPOWNTHREAD:
* Prevents this instance of the hook from receiving the events
* that are generated by the thread that is registering this
* hook.
*
* @return Type: HWINEVENTHOOK
* If successful, returns an HWINEVENTHOOK value that identifies
* this event hook instance. Applications save this return value to
* use it with the UnhookWinEvent function.
* If unsuccessful, returns zero.
*/
HANDLE SetWinEventHook(int eventMin, int eventMax, HMODULE hmodWinEventProc, WinEventProc winEventProc,
int processID, int threadID, int flags);
/**
* Removes an event hook function created by a previous call to
* SetWinEventHook.
*
* @param hook
* Type: HWINEVENTHOOK
* Handle to the event hook returned in the previous call to
* SetWinEventHook.
* @return Type: BOOL If successful, returns TRUE; otherwise, returns FALSE.
*
* Three common errors cause this function to fail:
* The hWinEventHook parameter is NULL or not valid.
* The event hook specified by hWinEventHook was already removed.
*
* UnhookWinEvent is called from a thread that is different from the
* original call to SetWinEventHook.
*/
boolean UnhookWinEvent(HANDLE hook);
/**
* Copies the specified icon from another module to the current module.
*
* @param hIcon
* A handle to the icon to be copied.
* @return If the function succeeds, the return value is a handle to the
* duplicate icon.
* If the function fails, the return value is NULL. To get extended
* error information, call GetLastError.
* @see MSDN
*/
HICON CopyIcon(HICON hIcon);
/**
* Retrieves the specified 32-bit (DWORD) value from the WNDCLASSEX
* structure associated with the specified window. Note If you are
* retrieving a pointer or a handle, this function has been superseded by
* the GetClassLongPtr function.
* (Pointers and handles are 32 bits on 32-bit Windows and 64 bits on 64-bit
* Windows.)
*
* @param hWnd
* A handle to the window and, indirectly, the class to which the
* window belongs.
* @param nIndex
* The value to be retrieved. To retrieve a value from the extra
* class memory, specify the positive, zero-based byte offset of
* the value to be retrieved. Valid values are in the range zero
* through the number of bytes of extra class memory, minus four;
* for example, if you specified 12 or more bytes of extra class
* memory, a value of 8 would be an index to the third integer.
* To retrieve any other value from the WNDCLASSEX structure,
* specify one of the following values.
GCW_ATOM: -32
* Retrieves an ATOM value that uniquely identifies the window
* class. This is the same atom that the RegisterClassEx function
* returns.
* GCL_CBCLSEXTRA: -20
* Retrieves the size, in bytes, of the extra memory associated
* with the class.
* GCL_CBWNDEXTRA: -18
* Retrieves the size, in bytes, of the extra window memory
* associated with each window in the class. For information on
* how to access this memory, see GetWindowLong.
* GCL_HBRBACKGROUND: -10
* Retrieves a handle to the background brush associated with the
* class.
* GCL_HCURSOR: -12
* Retrieves a handle to the cursor associated with the class.
*
* GCL_HICON: -14
* Retrieves a handle to the icon associated with the class.
* GCL_HICONSM: -34
* Retrieves a handle to the small icon associated with the
* class.
* GCL_HMODULE: -16
* Retrieves a handle to the module that registered the class.
*
* GCL_MENUNAME: -8
* Retrieves the address of the menu name string. The string
* identifies the menu resource associated with the class.
* GCL_STYLE: -26
* Retrieves the window-class style bits.
* GCL_WNDPROC: -24
* Retrieves the address of the window procedure, or a handle
* representing the address of the window procedure. You must use
* the CallWindowProc function to call the window procedure.
* @return Type: DWORD If the function succeeds, the return value is the
* requested value.
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
int GetClassLong(HWND hWnd, int nIndex);
/**
* Registers a new clipboard format. This format can then be used as a
* valid clipboard format.
*
* @param formatName The name of the new format.
*
* @return If the function succeeds, the return value identifies the
* registered clipboard format.
*
* If the function fails, the return value is zero. To get extended
* error information, call GetLastError.
*/
public int RegisterClipboardFormat(String formatName);
/**
* Retrieves the window handle to the active window attached to the
* calling thread's message queue.
*
* @return Type: HWND The return value is the handle to the active
* window attached to the calling thread's message queue. Otherwise,
* the return value is NULL.
*/
public HWND GetActiveWindow();
/**
* Sends the specified message to a window or windows.
* The SendMessage function calls the window procedure for the specified window and
* does not return until the window procedure has processed the message.
*
* To send a message and return immediately, use the SendMessageCallback or SendNotifyMessage function.
* To post a message to a thread's message queue and return immediately,
* use the PostMessage or PostThreadMessage function.
*
* @param hWnd A handle to the window whose window procedure will receive the message.
* If this parameter is HWND_BROADCAST ((HWND)0xffff), the message is sent to all
* top-level windows in the system, including disabled or invisible unowned windows,
* overlapped windows, and pop-up windows; but the message is not sent to child windows.
* Message sending is subject to UIPI. The thread of a process can send messages
* only to message queues of threads in processes of lesser or equal integrity level.
*
* @param msg The message to be sent.
* For lists of the system-provided messages, see System-Defined Messages.
* @param wParam Additional message-specific information.
* @param lParam Additional message-specific information.
*
* @return The return value specifies the result of the message processing; it depends on the message sent.
*
* Two classic usage :
* - with a WM_USER+x msg value : wParam and lParam are numeric values
* - with a WM_COPYDATA msg value : wParam is the length of the structure and lParam a pointer to a COPYDATASTRUCT
*/
LRESULT SendMessage(HWND hWnd, int msg, WPARAM wParam, LPARAM lParam);
}