IDirectDrawSurface7::EnumOverlayZOrders

The IDirectDrawSurface7::EnumOverlayZOrders method enumerates the overlay surfaces on the specified destination. The overlays can be enumerated in front-to-back or back-to-front order.

HRESULT EnumOverlayZOrders(
  DWORD dwFlags,                          
  LPVOID lpContext,                       
  LPDDENUMSURFACESCALLBACK2 lpfnCallback  
);

Parameters

dwFlags

One of the following flags:

DDENUMOVERLAYZ_BACKTOFRONT

Enumerates overlays back to front.

DDENUMOVERLAYZ_FRONTTOBACK

Enumerates overlays front to back.

lpContext

Address of the user-defined context to be passed to the callback function for each overlay surface.

lpfnCallback

Address of the EnumSurfacesCallback2 callback function to be called for each surface to be overlaid on this surface.

Return Values

If the method succeeds, the return value is DD_OK.

If it fails, the method can return one of the following error values:

Remarks

This method differs from its counterparts in previous interface versions in that it accepts a pointer to an EnumSurfacesCallback2 function, rather than an EnumSurfacesCallback function.

Requirements

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 98.
  Header: Declared in ddraw.h.