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LookupIconIdFromDirectoryEx info  Overview  Group

The LookupIconIdFromDirectoryEx function searches through icon or cursor data for the icon or cursor that best fits the current display device.

int LookupIconIdFromDirectoryEx(

    PBYTE presbits,

// address of resource data

    BOOL fIcon,

// icon or cursor flag

    int cxDesired,

// desired width of icon or cursor

    int cyDesired,

// desired height of icon or cursor

    UINT Flags

// resource flags

   );

Parameters

presbits
Points to the icon or cursor directory data. Because this function does not validate the resource data, it causes a general protection (GP) fault or returns an undefined value if presbits is not pointing to valid resource data.
fIcon
Specifies whether an icon or a cursor is sought. If this parameter is TRUE, the function is searching for an icon; if the parameter is FALSE, the function is searching for a cursor.
cxDesired
Specifies the desired width, in pixels, of the icon. If this parameter is zero, the function uses the SM_CXICON or SM_CXCURSOR system metric value.
cyDesired
Specifies the desired height, in pixels, of the icon. If this parameter is zero, the function uses the SM_CYICON or SM_CYCURSOR system metric value.
Flags
Specifies a combination of the following values:

Value

Meaning

LR_DEFAULTCOLOR

Uses the default color format.

LR_MONOCHROME

Creates a monochrome icon or cursor.

Return Values

If the function succeeds, the return value is an integer resource identifier for the icon or cursor that best fits the current display device.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

A resource file of type RT_GROUP_ICON (RT_GROUP_CURSOR indicates cursors) contains icon (or cursor) data in several device-dependent and device-independent formats. LookupIconIdFromDirectoryEx searches the resource file for the icon (or cursor) that best fits the current display device and returns its integer identifier. The FindResource and FindResourceEx functions use the MAKEINTRESOURCE macro with this identifier to locate the resource in the module.

The icon directory is loaded from a resource file with resource type RT_GROUP_ICON (or RT_GROUP_CURSOR for cursors), and an integer resource name for the specific icon to be loaded. LookupIconIdFromDirectoryEx returns an integer identifier that is the resource name of the icon that best fits the current display device.

The LoadIcon, LoadImage, and LoadCursor functions use this function to search the specified resource data for the icon or cursor that best fits the current display device.

See Also

CreateIconFromResourceEx, CreateIconIndirect, FindResource, FindResourceEx, GetIconInfo, LoadCursor, LoadIcon, LoadImage, LookupIconIdFromDirectory, MAKEINTRESOURCE

See also:


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