| Platform SDK: DirectX | 
The CONST_DDENUMOVERLAYZFLAGS enumeration is used by the flags parameter of the DirectDrawSurface7.GetOverlayZOrdersEnum method to control how the method enumerates the overlay z-order.
Enum CONST_DDENUMSURFACESFLAGS
    DDENUMOVERLAYZ_BACKTOFRONT = 0 
    DDENUMOVERLAYZ_FRONTTOBACK = 1
End Enum