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LookupIconIdFromDirectory info  Overview  Group

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

int LookupIconIdFromDirectory(

    PBYTE presbits,

// address of resource data

    BOOL fIcon 

// look for icon or cursor

   );

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.

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. LookupIconIdFromDirectory 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. LookupIconIdFromDirectory returns an integer identifier that is the resource name of the icon that best fits the current display device.

The LoadIcon, LoadCursor, and LoadImage (in Windows 95) functions use this function to search the specified resource data for the icon or cursor that best fits the current display device.

See Also

CreateIconFromResource, CreateIconIndirect, FindResource, FindResourceEx, GetIconInfo, LoadCursor, LoadIcon, LoadImage, LookupIconIdFromDirectoryEx, MAKEINTRESOURCE 

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