The EnumModesCallback is an application-defined callback function for the IDirectDraw2::EnumDisplayModes method.
HRESULT WINAPI EnumModesCallback(
LPDDSURFACEDESC lpDDSurfaceDesc,
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 LPDDENUMMODESCALLBACK data type to declare a variable that can contain a pointer to this callback function.