The DDEnumCallback is an application-defined callback function for the DirectDrawEnumerate function.
BOOL WINAPI DDEnumCallback(
GUID FAR *lpGUID,
LPSTR lpDriverDescription,
LPSTR lpDriverName,
LPVOID lpContext
);
The callback function returns DDENUMRET_OK to continue the enumeration.
The callback function returns DDENUMRET_CANCEL to stop it.
You can use the LPDDENUMCALLBACK data type to declare a variable that can contain a pointer to this callback function.