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/* Copyright (c) 2012 Tobias Wolf, 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.Memory;
import java.util.List;

import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.Structure.FieldOrder;
import com.sun.jna.platform.win32.Guid.GUID;
import com.sun.jna.platform.win32.OaIdl.DISPID;
import com.sun.jna.platform.win32.OaIdl.SAFEARRAY;
import com.sun.jna.platform.win32.OaIdl.SAFEARRAYBOUND;
import com.sun.jna.platform.win32.Variant.VARIANT;
import com.sun.jna.platform.win32.Variant.VariantArg;
import com.sun.jna.platform.win32.WTypes.BSTR;
import com.sun.jna.platform.win32.WTypes.VARTYPE;
import com.sun.jna.platform.win32.WTypes.VARTYPEByReference;
import com.sun.jna.platform.win32.WinBase.SYSTEMTIME;
import com.sun.jna.platform.win32.WinDef.LCID;
import com.sun.jna.platform.win32.WinDef.LONG;
import com.sun.jna.platform.win32.WinDef.PVOID;
import com.sun.jna.platform.win32.WinDef.UINT;
import com.sun.jna.platform.win32.WinNT.HRESULT;
import com.sun.jna.ptr.DoubleByReference;
import com.sun.jna.ptr.PointerByReference;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

/**
 * Oleaut32.dll Interface.
 *
 * @author scott.palmer
 */
public interface OleAuto extends StdCallLibrary {

    /**
     * The instance.
     */
    OleAuto INSTANCE = Native.load("OleAut32", OleAuto.class, W32APIOptions.DEFAULT_OPTIONS);

    /* Flags for IDispatch::Invoke */
    /**
     * The Constant DISPATCH_METHOD.
     */
    int DISPATCH_METHOD = 0x1;

    /**
     * The Constant DISPATCH_PROPERTYGET.
     */
    int DISPATCH_PROPERTYGET = 0x2;

    /**
     * The Constant DISPATCH_PROPERTYPUT.
     */
    int DISPATCH_PROPERTYPUT = 0x4;

    /**
     * The Constant DISPATCH_PROPERTYPUTREF.
     */
    int DISPATCH_PROPERTYPUTREF = 0x8;

    /**
     * An array that is allocated on the stac.
     */
    int FADF_AUTO = 0x0001;

    /**
     * An array that is statically allocated.
     */
    int FADF_STATIC = 0x0002;

    /**
     * An array that is embedded in a structure.
     */
    int FADF_EMBEDDED = 0x0004;

    /**
     * An array that is embedded in a structure.
     */
    int FADF_FIXEDSIZE = 0x0010;

    /**
     * An array that is embedded in a structure.
     */
    int FADF_RECORD = 0x0020;

    /**
     * An array that is embedded in a structure.
     */
    int FADF_HAVEIID = 0x0040;

    /**
     * An array that has a variant type. The variant type can be retrieved with
     * SafeArrayGetVartype.
     */
    int FADF_HAVEVARTYPE = 0x0080;

    /**
     * An array of BSTRs.
     */
    int FADF_BSTR = 0x0100;

    /**
     * An array of IUnknown*.
     */
    int FADF_UNKNOWN = 0x0200;

    /**
     * An array of IDispatch*.
     */
    int FADF_DISPATCH = 0x0400;

    /**
     * An array of VARIANTs.
     */
    int FADF_VARIANT = 0x0800;

    /**
     * Bits reserved for future use.
     */
    int FADF_RESERVED = 0xF008;

    /**
     * This function allocates a new string and copies the passed string into
     * it.
     *
     * @param sz Null-terminated UNICODE string to copy.
     *
     * @return Null if there is insufficient memory or if a null pointer is
     *         passed in.
     */
    BSTR SysAllocString(String sz);

    /**
     * This function frees a string allocated previously by SysAllocString,
     * SysAllocStringByteLen, SysReAllocString, SysAllocStringLen, or
     * SysReAllocStringLen.
     *
     * @param bstr Unicode string that was allocated previously, or NULL.
     *             Setting this parameter to NULL causes the function to simply
     *             return.
     */
    void SysFreeString(BSTR bstr);

    /**
     * Returns the length (in bytes) of a BSTR.
     *
     * @param bstr Unicode string that was allocated previously.
     */
    int SysStringByteLen(BSTR bstr);

    /**
     * Returns the length of a BSTR.
     *
     * @param bstr Unicode string that was allocated previously.
     */
    int SysStringLen(BSTR bstr);

    /**
     * The VariantInit function initializes the VARIANTARG by setting the vt
     * field to VT_EMPTY. Unlike VariantClear, this function does not interpret
     * the current contents of the VARIANTARG. Use VariantInit to initialize new
     * local variables of type VARIANTARG (or VARIANT).
     *
     * @param pvarg The variant to initialize.
     */
    void VariantInit(VARIANT.ByReference pvarg);

    /**
     * The VariantInit function initializes the VARIANTARG by setting the vt
     * field to VT_EMPTY. Unlike VariantClear, this function does not interpret
     * the current contents of the VARIANTARG. Use VariantInit to initialize new
     * local variables of type VARIANTARG (or VARIANT).
     *
     * @param pvarg The variant to initialize.
     */
    void VariantInit(VARIANT pvarg);

    /**
     * First, free any memory that is owned by pvargDest, such as VariantClear
     * (pvargDest must point to a valid initialized variant, and not simply to
     * an uninitialized memory location). Then pvargDest receives an exact copy
     * of the contents of pvargSrc.
     * 
     * If pvargSrc is a VT_BSTR, a copy of the string is made. If pvargSrcis a
     * VT_ARRAY, the entire array is copied. If pvargSrc is a VT_DISPATCH or
     * VT_UNKNOWN, AddRef is called to increment the object's reference count.
     * 

     * If the variant to be copied is a COM object that is passed by reference,
     * the vtfield of the pvargSrcparameter is VT_DISPATCH | VT_BYREF or
     * VT_UNKNOWN | VT_BYREF. In this case, VariantCopy does not increment the
     * reference count on the referenced object. Because the variant being
     * copied is a pointer to a reference to an object, VariantCopy has no way
     * to determine if it is necessary to increment the reference count of the
     * object. It is therefore the responsibility of the caller to call
     * IUnknown::AddRef on the object or not, as appropriate.
     * 

     * Note The VariantCopy method is not threadsafe.
     *
     * @param pvargDest [out] The destination variant.
     * @param pvargSrc [in] The source variant.
     *
     * @return the hresult
     */
    HRESULT VariantCopy(Pointer pvargDest, VARIANT pvargSrc);

    /**
     * Use this function to clear variables of type VARIANTARG (or VARIANT)
     * before the memory containing the VARIANTARG is freed (as when a local
     * variable goes out of scope).
     * 

     * The function clears a VARIANTARG by setting the vt field to VT_EMPTY. The
     * current contents of the VARIANTARG are released first. If the vtfield is
     * VT_BSTR, the string is freed. If the vtfield is VT_DISPATCH, the object
     * is released. If the vt field has the VT_ARRAY bit set, the array is
     * freed.
     * 

     * If the variant to be cleared is a COM object that is passed by reference,
     * the vtfield of the pvargparameter is VT_DISPATCH | VT_BYREF or VT_UNKNOWN
     * | VT_BYREF. In this case, VariantClear does not release the object.
     * Because the variant being cleared is a pointer to a reference to an
     * object, VariantClear has no way to determine if it is necessary to
     * release the object. It is therefore the responsibility of the caller to
     * release the object or not, as appropriate.
     * 

     * In certain cases, it may be preferable to clear a variant in code without
     * calling VariantClear. For example, you can change the type of a VT_I4
     * variant to another type without calling this function. Safearrays of BSTR
     * will have SysFreeString called on each element not VariantClear. However,
     * you must call VariantClear if a VT_type is received but cannot be
     * handled. Safearrays of variant will also have VariantClear called on each
     * member. Using VariantClear in these cases ensures that code will continue
     * to work if Automation adds new variant types in the future.
     * 

     * Do not use VariantClear on unitialized variants; use VariantInit to
     * initialize a new VARIANTARG or VARIANT.
     * 

     * Variants containing arrays with outstanding references cannot be cleared.
     * Attempts to do so will return an HRESULT containing DISP_E_ARRAYISLOCKED.
     *
     * @param pvarg [in, out] The variant to clear.
     *
     * @return the hresult
     */
    HRESULT VariantClear(VARIANT pvarg);

    public static final short VARIANT_NOVALUEPROP = 0x01;
    /**
     * For VT_BOOL to VT_BSTR conversions, convert to "True"/"False" instead of
     * "-1"/"0"
     */
    public static final short VARIANT_ALPHABOOL = 0x02;
    /**
     * For conversions to/from VT_BSTR, passes LOCALE_NOUSEROVERRIDE to core
     * coercion routines
     */
    public static final short VARIANT_NOUSEROVERRIDE = 0x04;
    public static final short VARIANT_CALENDAR_HIJRI = 0x08;
    /**
     * For VT_BOOL to VT_BSTR and back, convert to local language rather than
     * English
     */
    public static final short VARIANT_LOCALBOOL = 0x10;
    /**
     * SOUTHASIA calendar support
     */
    public static final short VARIANT_CALENDAR_THAI = 0x20;
    /**
     * SOUTHASIA calendar support
     */
    public static final short VARIANT_CALENDAR_GREGORIAN = 0x40;
    /**
     * NLS function call support
     */
    public static final short VARIANT_USE_NLS = 0x80;

    /**
     * Converts a variant from one type to another.
     *
     * @param pvargDest [out] The destination variant. If this is the same as
     *                  pvarSrc, the variant will be converted in place.
     * @param pvarSrc   [in] The variant to convert.
     * @param wFlags    Combination of the following flags
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * wFlags Value Meaning
{@link #VARIANT_NOVALUEPROP} Prevents the
     * function from attempting to coerce an object to a fundamental type by
     * getting the Value property. Applications should set this flag only if
     * necessary, because it makes their behavior inconsistent with other
     * applications.
{@link #VARIANT_ALPHABOOL} Converts a
     * {@link Variant#VT_BOOL VT_BOOL} value to a string containing either
     * "True" or "False".
{@link #VARIANT_NOUSEROVERRIDE} For conversions
     * to or from {@link Variant#VT_BSTR VT_BSTR}, passes LOCALE_NOUSEROVERRIDE
     * to the core coercion routines.
{@link #VARIANT_LOCALBOOL} For conversions from
     * {@link Variant#VT_BOOL VT_BOOL} to {@link Variant#VT_BSTR VT_BSTR} and
     * back, uses the language specified by the locale in use on the local
     * computer.
     * @param vt        The type to convert to. If the return code is
     *                  {@link WinError#S_OK S_OK}, the vt field of the vargDest
     *                  is guaranteed to be equal to this value.
     *
     * @return This function can return one of these values:
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * 
     * Return code Description
{@link WinError#S_OK S_OK} Success.
{@link WinError#DISP_E_BADVARTYPE DISP_E_BADVARTYPE} The
     * variant type is not a valid type of variant.
{@link WinError#DISP_E_OVERFLOW DISP_E_OVERFLOW} The data
     * pointed to by pvarSrc does not fit in the destination type.
{@link WinError#DISP_E_TYPEMISMATCH DISP_E_TYPEMISMATCH} The
     * argument could not be coerced to the specified type.
{@link WinError#E_INVALIDARG E_INVALIDARG} One of the
     * arguments is not valid.
{@link WinError#E_OUTOFMEMORY E_OUTOFMEMORY} Insufficient
     * memory to complete the operation.
     * 
     * Remarks
     * 
     * The VariantChangeType function handles coercions between the fundamental
     * types (including numeric-to-string and string-to-numeric coercions). The
     * pvarSrc argument is changed during the conversion process. For example,
     * if the source variant is of type {@link Variant#VT_BOOL VT_BOOL} and the
     * destination is of type {@link Variant#VT_UINT VT_UINT}, the pvarSrc
     * argument is first converted to {@link Variant#VT_I2 VT_I2} and then the
     * conversion proceeds. A variant that has {@link Variant#VT_BYREF VT_BYREF}
     * set is coerced to a value by obtaining the referenced value. An object is
     * coerced to a value by invoking the object's Value property
     * ({@link OaIdl#DISPID_VALUE DISPID_VALUE}).
     * 
     * Typically, the implementor of
     * {@link com.sun.jna.platform.win32.COM.IDispatch#Invoke IDispatch.Invoke}
     * determines which member is being accessed, and then calls
     * VariantChangeType to get the value of one or more arguments. For example,
     * if the IDispatch call specifies a SetTitle member that takes one string
     * argument, the implementor would call VariantChangeType to attempt to
     * coerce the argument to {@link Variant#VT_BSTR VT_BSTR}. If
     * VariantChangeType does not return an error, the argument could then be
     * obtained directly from the
     * {@link Variant.VARIANT._VARIANT.__VARIANT#bstrVal bstrVal} field of the
     * {@link Variant.VARIANT VARIANT}. If VariantChangeType returns
     * {@link WinError#DISP_E_TYPEMISMATCH DISP_E_TYPEMISMATCH}, the implementor
     * would set {@link com.sun.jna.platform.win32.COM.IDispatch#Invoke Invoke}
     *  puArgErr parameter referenced value to 0 (indicating the
     * argument in error) and return DISP_E_TYPEMISMATCH from Invoke.
     * 
     * Arrays of one type cannot be converted to arrays of another type with
     * this function.
     * 
     * Note The type of a {@link Variant.VARIANT VARIANT} should not be
     * changed in the {@link DISPPARAMS#rgvarg rgvarg} array in place.
     */
    HRESULT VariantChangeType(VARIANT pvargDest, VARIANT pvarSrc, short wFlags, VARTYPE vt);

    /**
     * Converts a variant from one type to another.
     * @param pvargDest [out] The destination variant. If this is the same as
     *                      pvarSrc, the variant will be converted in place.
     * @param pvarSrc [in] The variant to convert.
     * @param wFlags Combination of the following flags
     * 
     *     
     *         
     *     
     *     
     *         
     *         
     *         
     *         
     *     
     * wFlags Value Meaning
{@link #VARIANT_NOVALUEPROP} Prevents the function from attempting to coerce an object to a fundamental type by getting the Value property. Applications should set this flag only if necessary, because it makes their behavior inconsistent with other applications.
{@link #VARIANT_ALPHABOOL} Converts a {@link Variant#VT_BOOL VT_BOOL} value to a string containing either "True" or "False".
{@link #VARIANT_NOUSEROVERRIDE} For conversions to or from {@link Variant#VT_BSTR VT_BSTR}, passes LOCALE_NOUSEROVERRIDE to the core coercion routines.
{@link #VARIANT_LOCALBOOL} For conversions from {@link Variant#VT_BOOL VT_BOOL} to {@link Variant#VT_BSTR VT_BSTR} and back, uses the language specified by the locale in use on the local computer.
     * @param vt The type to convert to. If the return code is {@link WinError#S_OK S_OK}, the vt
     *           field of the vargDest is guaranteed to be equal to this value.
     * @return This function can return one of these values:
     * 
     *     
     *         
     *     
     *     
     *         
     *         
     *         
     *         
     *         
     *         
     *     
     * Return code Description
{@link WinError#S_OK S_OK} Success.
{@link WinError#DISP_E_BADVARTYPE DISP_E_BADVARTYPE} The variant type is not a valid type of variant.
{@link WinError#DISP_E_OVERFLOW DISP_E_OVERFLOW} The data pointed to by pvarSrc does not fit in the destination type.
{@link WinError#DISP_E_TYPEMISMATCH DISP_E_TYPEMISMATCH} The argument could not be coerced to the specified type.
{@link WinError#E_INVALIDARG E_INVALIDARG} One of the arguments is not valid.
{@link WinError#E_OUTOFMEMORY E_OUTOFMEMORY} Insufficient memory to complete the operation.
     *
     * Remarks
     *
     * The VariantChangeType function handles coercions between the fundamental
     * types (including numeric-to-string and string-to-numeric coercions). The
     * pvarSrc argument is changed during the conversion process. For example,
     * if the source variant is of type {@link Variant#VT_BOOL VT_BOOL} and the
     * destination is of type {@link Variant#VT_UINT VT_UINT}, the pvarSrc
     * argument is first converted to {@link Variant#VT_I2 VT_I2} and then the
     * conversion proceeds. A variant that has {@link Variant#VT_BYREF VT_BYREF}
     * set is coerced to a value by obtaining the referenced value. An object is
     * coerced to a value by invoking the object's Value property
     * ({@link OaIdl#DISPID_VALUE DISPID_VALUE}).
     *
     * Typically, the implementor of
     * {@link com.sun.jna.platform.win32.COM.IDispatch#Invoke IDispatch.Invoke}
     * determines which member is being accessed, and then calls
     * VariantChangeType to get the value of one or more arguments. For example,
     * if the IDispatch call specifies a SetTitle member that takes one string
     * argument, the implementor would call VariantChangeType to attempt to
     * coerce the argument to {@link Variant#VT_BSTR VT_BSTR}. If
     * VariantChangeType does not return an error, the argument could then be
     * obtained directly from the
     * {@link Variant.VARIANT._VARIANT.__VARIANT#bstrVal bstrVal} field of the
     * {@link Variant.VARIANT VARIANT}. If VariantChangeType returns
     * {@link WinError#DISP_E_TYPEMISMATCH DISP_E_TYPEMISMATCH}, the implementor
     * would set {@link com.sun.jna.platform.win32.COM.IDispatch#Invoke Invoke}
     *  puArgErr parameter referenced value to 0 (indicating the
     * argument in error) and return DISP_E_TYPEMISMATCH from Invoke.
     *
     * Arrays of one type cannot be converted to arrays of another type with
     * this function.
     *
     * Note The type of a {@link Variant.VARIANT VARIANT} should not be
     * changed in the {@link DISPPARAMS#rgvarg rgvarg} array in place.
     */
    HRESULT VariantChangeType(VARIANT.ByReference pvargDest, VARIANT.ByReference pvarSrc, short wFlags, VARTYPE vt);


    /**
     * Creates a new array descriptor, allocates and initializes the data for
     * the array, and returns a pointer to the new array descriptor.
     *
     * @param vt [in] The base type of the array (the VARTYPE of each
     *                  element of the array). The VARTYPE is restricted to a
     *                  subset of the variant types. Neither the VT_ARRAY nor
     *                  the VT_BYREF flag can be set. VT_EMPTY and VT_NULL are
     *                  not valid base types for the array. All other types are
     *                  legal. cDims
     *
     * @param cDims the number of dims
     * @param rgsabound the rgsabound
     *
     * @return Return value
     *
     * A safe array descriptor, or null if the array could not be created.
     */
    SAFEARRAY.ByReference SafeArrayCreate(VARTYPE vt, UINT cDims,
            SAFEARRAYBOUND[] rgsabound);

    /**
     * Stores the data element at the specified location in the array.
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     * @param idx the idx
     * @param pv [in] The data to assign to the array. The variant types
     *            VT_DISPATCH, VT_UNKNOWN, and VT_BSTR are pointers, and do not
     *            require another level of indirection.
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * DISP_E_BADINDEX
The specified index is not valid.
     * E_INVALIDARG
One of the arguments is not valid.
     * E_OUTOFMEMORY
Memory could not be allocated for the
     * element.
     * 
     */
    HRESULT SafeArrayPutElement(SAFEARRAY psa, LONG[] idx, Pointer pv);

    /**
     * Retrieve the upper bound for the specified dimension of the supplied
     * array
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     * @param nDim [in] the dimension, one based
     * @param bound [out] upper bound for the supplied dimension
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * DISP_E_BADINDEX
The specified index is not valid.
     * E_INVALIDARG
One of the arguments is not valid.
     * 
     */
    HRESULT SafeArrayGetUBound(SAFEARRAY psa, UINT nDim, WinDef.LONGByReference bound);

    /**
     * Retrieve the lower bound for the specified dimension of the supplied
     * array
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     * @param nDim [in] the dimension, one based
     * @param bound [out] lower bound for the supplied dimension
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * DISP_E_BADINDEX
The specified index is not valid.
     * E_INVALIDARG
One of the arguments is not valid.
     * 
     */
    HRESULT SafeArrayGetLBound(SAFEARRAY psa, UINT nDim, WinDef.LONGByReference bound);

    /**
     * Retrieves a single element of the array.
     * 
     * The array is automaticly locked via SafeArrayLock and SafeArrayUnlock.
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     * @param rgIndices [in] A vector of indexes for each dimension of the
     *                  array. The right-most (least significant) dimension is
     *                  rgIndices[0]. The left-most dimension is stored at
     *                  rgIndices[psa->cDims - 1].
     * @param pv [out] The element of the array.
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 

     * S_OK
Success.
     * DISP_E_BADINDEX
The specified index is not valid.
     * E_INVALIDARG
One of the arguments is not valid.
     * E_OUTOFMEMORY
Memory could not be allocated for the
     * element.
     * 
     */
    HRESULT SafeArrayGetElement(SAFEARRAY psa, LONG[] rgIndices, Pointer pv);

    /**
     * Retrieves the pointer to a single element of the array.
     * 
     * 

     * The caller is responsible for locking.
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     * @param rgIndices [in] A vector of indexes for each dimension of the
     *                  array. The right-most (least significant) dimension is
     *                  rgIndices[0]. The left-most dimension is stored at
     *                  rgIndices[psa->cDims - 1].
     * @param ppv [out] The element of the array.
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * DISP_E_BADINDEX
The specified index is not valid.
     * E_INVALIDARG
One of the arguments is not valid.
     * 
     */
    HRESULT SafeArrayPtrOfIndex(SAFEARRAY psa, LONG[] rgIndices, PointerByReference ppv);

    /**
     * Increments the lock count of an array, and places a pointer to the array
     * data in pvData of the array descriptor.
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * E_INVALIDARG
The argument psa is not valid.
     * E_UNEXPECTED
The array could not be locked.
     * 
     */
    HRESULT SafeArrayLock(SAFEARRAY psa);

    /**
     * Decrements the lock count of an array so it can be freed or resized.
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * E_INVALIDARG
The argument psa is not valid.
     * E_UNEXPECTED
The array could not be locked.
     * 
     */
    HRESULT SafeArrayUnlock(SAFEARRAY psa);

    /**
     * Destroys an existing array descriptor and all of the data in the array.
     * If objects are stored in the array, Release is called on each object in
     * the array.
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * E_INVALIDARG
The argument psa is not valid.
     * DISP_E_ARRAYISLOCKED
The array could not be locked.
     * 
     */
    HRESULT SafeArrayDestroy(SAFEARRAY psa);

    /**
     * Changes the right-most (least significant) bound of the specified safe
     * array.
     *
     * @param psa [in, out] An array descriptor created by
     *                    SafeArrayCreate.
     * @param psaboundNew [in] New bounds for the least significant dimension
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * E_INVALIDARG
The argument psa is not valid.
     * DISP_E_ARRAYISLOCKED
The array could not be locked.
     * 
     */
    HRESULT SafeArrayRedim(SAFEARRAY psa, SAFEARRAYBOUND psaboundNew);

    /**
     * Return VARTYPE of the SAFEARRAY
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     * @param pvt [in] Vartype of the SAFEARRAY
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * E_INVALIDARG
The argument psa is not valid.
     * 
     */
    HRESULT SafeArrayGetVartype(SAFEARRAY psa, VARTYPEByReference pvt);

    /**
     * Return number of dimensions of the SAFEARRAY
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     *
     * @return Return count of dimensions
     */
    UINT SafeArrayGetDim(SAFEARRAY psa);

    /**
     * Lock array and retrieve pointer to data
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     * @param ppvData [in] pointer to the data array
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * E_INVALIDARG
The argument psa is not valid.
     * E_UNEXPECTED
The array could not be locked.
     * 
     */
    HRESULT SafeArrayAccessData(SAFEARRAY psa, PointerByReference ppvData);

    /**
     * Unlock array and invalidate the pointer retrieved via SafeArrayAccessData
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     *
     * @return Return value
     *
     * This function can return one of these values.
     *
     * 
     * S_OK
Success.
     * E_INVALIDARG
The argument psa is not valid.
     * E_UNEXPECTED
The array could not be locked.
     * 
     */
    HRESULT SafeArrayUnaccessData(SAFEARRAY psa);

    /**
     * Get size of one element in bytes
     *
     * @param psa [in] An array descriptor created by SafeArrayCreate.
     *
     * @return size in bytes
     */
    UINT SafeArrayGetElemsize(SAFEARRAY psa);

    /**
     * Retrieves a pointer to a running object that has been registered with
     * OLE.
     *
     * @param rclsid [in] The class identifier (CLSID) of the active object
     *                   from the OLE registration database.
     * @param pvReserved Reserved for future use. Must be null.
     * @param ppunk [out] The requested active object.
     *
     * @return Return value
     *
     * If this function succeeds, it returns S_OK. Otherwise, it returns an
     * HRESULT error code.
     */
    HRESULT GetActiveObject(GUID rclsid, PVOID pvReserved, PointerByReference ppunk);

    /**
     * The Class DISPPARAMS.
     */
    @FieldOrder({"rgvarg", "rgdispidNamedArgs", "cArgs", "cNamedArgs"})
    public class DISPPARAMS extends Structure {

        /**
         * The Class ByReference.
         */
        public static class ByReference extends DISPPARAMS implements
            Structure.ByReference {
        }

        /**
         * The rgvarg.
         */
        public VariantArg.ByReference rgvarg;

        /**
         * The rgdispid named args.
         */
        public Pointer rgdispidNamedArgs = Pointer.NULL;

        /**
         * The c args. - use setArgs to update arguments
         */
        public UINT cArgs = new UINT(0);

        /**
         * The c named args. - use setRgdispidNamedArgs to update named
         * arguments map
         */
        public UINT cNamedArgs = new UINT(0);

        public DISPID[] getRgdispidNamedArgs() {
            DISPID[] namedArgs = null;
            int count = cNamedArgs.intValue();
            if (rgdispidNamedArgs != null && count > 0) {
                int[] rawData = rgdispidNamedArgs.getIntArray(0, count);
                namedArgs = new DISPID[count];
                for (int i = 0; i < count; i++) {
                    namedArgs[i] = new DISPID(rawData[i]);
                }
            } else {
                namedArgs = new DISPID[0];
            }
            return namedArgs;
        }

        public void setRgdispidNamedArgs(DISPID[] namedArgs) {
            if (namedArgs == null) {
                namedArgs = new DISPID[0];
            }
            cNamedArgs = new UINT(namedArgs.length);
            rgdispidNamedArgs = new Memory(DISPID.SIZE * namedArgs.length);
            int[] rawData = new int[namedArgs.length];
            for (int i = 0; i < rawData.length; i++) {
                rawData[i] = namedArgs[i].intValue();
            }
            rgdispidNamedArgs.write(0, rawData, 0, namedArgs.length);
        }

        public VARIANT[] getArgs() {
            if (this.rgvarg != null) {
                this.rgvarg.setArraySize(cArgs.intValue());
                return this.rgvarg.variantArg;
            } else {
                return new VARIANT[0];
            }
        }

        public void setArgs(VARIANT[] arguments) {
            if (arguments == null) {
                arguments = new VARIANT[0];
            }

            rgvarg = new VariantArg.ByReference(arguments);
            cArgs = new UINT(arguments.length);
        }

        /**
         * Instantiates a new dispparams.
         */
        public DISPPARAMS() {
            super();
        }

        /**
         * Instantiates a new dispparams.
         *
         * @param memory the memory
         */
        public DISPPARAMS(Pointer memory) {
            super(memory);
            this.read();
        }
    }

    /**
     * Uses registry information to load a type library.
     *
     * @param rguid The GUID of the library.
     * @param wVerMajor The major version of the library.
     * @param wVerMinor The minor version of the library.
     * @param lcid The national language code of the library.
     * @param pptlib The loaded type library.
     *
     * This function can return one of these values: S_OK Success.
     *
     * E_INVALIDARG One or more of the arguments is not valid.
     *
     * E_OUTOFMEMORY Insufficient memory to complete the operation.
     *
     * TYPE_E_IOERROR The function could not write to the file.
     *
     * TYPE_E_INVALIDSTATE The type library could not be opened.
     *
     * TYPE_E_INVDATAREAD The function could not read from the file.
     *
     * TYPE_E_UNSUPFORMAT The type library has an older format.
     *
     * TYPE_E_UNKNOWNLCID The LCID could not be found in the OLE-supported DLLs.
     *
     * TYPE_E_CANTLOADLIBRARY The type library or DLL could not be loaded.
     *
     * @return status
     */
    HRESULT LoadRegTypeLib(GUID rguid, int wVerMajor, int wVerMinor, LCID lcid, PointerByReference pptlib);

    /**
     * Loads and registers a type library.
     *
     * @param szFile The name of the file from which the method should attempt
     *               to load a type library.
     *
     * @param pptlib The loaded type library. Return value
     *
     * This function can return one of these values.
     *
     * S_OK Success.
     *
     * E_INVALIDARG One or more of the arguments is not valid.
     *
     * E_OUTOFMEMORY Insufficient memory to complete the operation.
     *
     * TYPE_E_IOERROR The function could not write to the file.
     *
     * TYPE_E_INVALIDSTATE The type library could not be opened.
     *
     * TYPE_E_INVDATAREAD The function could not read from the file.
     *
     * TYPE_E_UNSUPFORMAT The type library has an older format.
     *
     * TYPE_E_UNKNOWNLCID The LCID could not be found in the OLE-supported DLLs.
     *
     * TYPE_E_CANTLOADLIBRARY The type library or DLL could not be loaded.
     *
     * @return status
     */
    HRESULT LoadTypeLib(String szFile, PointerByReference pptlib);

    /**
     * Converts a system time to a variant representation.
     *
     * @param lpSystemTime [in] The system time.
     *
     * @param pvtime [out] The variant time.
     *
     * @return The function returns TRUE on success and FALSE otherwise.
     */
    int SystemTimeToVariantTime(SYSTEMTIME lpSystemTime, DoubleByReference pvtime);
}
wFlags	Value	Meaning
	{@link #VARIANT_NOVALUEPROP}	Prevents the * function from attempting to coerce an object to a fundamental type by * getting the Value property. Applications should set this flag only if * necessary, because it makes their behavior inconsistent with other * applications.
	{@link #VARIANT_ALPHABOOL}	Converts a * {@link Variant#VT_BOOL VT_BOOL} value to a string containing either * "True" or "False".
	{@link #VARIANT_NOUSEROVERRIDE}	For conversions * to or from {@link Variant#VT_BSTR VT_BSTR}, passes LOCALE_NOUSEROVERRIDE * to the core coercion routines.
	{@link #VARIANT_LOCALBOOL}	For conversions from * {@link Variant#VT_BOOL VT_BOOL} to {@link Variant#VT_BSTR VT_BSTR} and * back, uses the language specified by the locale in use on the local * computer.
Return code	Description
{@link WinError#S_OK S_OK}	Success.
{@link WinError#DISP_E_BADVARTYPE DISP_E_BADVARTYPE}	The * variant type is not a valid type of variant.
{@link WinError#DISP_E_OVERFLOW DISP_E_OVERFLOW}	The data * pointed to by pvarSrc does not fit in the destination type.
{@link WinError#DISP_E_TYPEMISMATCH DISP_E_TYPEMISMATCH}	The * argument could not be coerced to the specified type.
{@link WinError#E_INVALIDARG E_INVALIDARG}	One of the * arguments is not valid.
{@link WinError#E_OUTOFMEMORY E_OUTOFMEMORY}	Insufficient * memory to complete the operation.
wFlags	Value	Meaning
	{@link #VARIANT_NOVALUEPROP}	Prevents the function from attempting to coerce an object to a fundamental type by getting the Value property. Applications should set this flag only if necessary, because it makes their behavior inconsistent with other applications.
	{@link #VARIANT_ALPHABOOL}	Converts a {@link Variant#VT_BOOL VT_BOOL} value to a string containing either "True" or "False".
	{@link #VARIANT_NOUSEROVERRIDE}	For conversions to or from {@link Variant#VT_BSTR VT_BSTR}, passes LOCALE_NOUSEROVERRIDE to the core coercion routines.
	{@link #VARIANT_LOCALBOOL}	For conversions from {@link Variant#VT_BOOL VT_BOOL} to {@link Variant#VT_BSTR VT_BSTR} and back, uses the language specified by the locale in use on the local computer.