|Microsoft DirectX 9.0|
The UpdateOverlayDisplay method repaints the rectangles in the dirty rectangle lists of all active overlays. The dirty rectangle list is cleared. This function is for software emulation only; it does nothing if the hardware supports overlays.
HRESULT UpdateOverlayDisplay( DWORD dwFlags );
Specify type of update to perform.
|DDOVER_REFRESHDIRTYRECTS||Update the overlay display using the list of dirty rectangles previously constructed for this destination. The dirty rectangle list is cleared after this.|
|DDOVER_REFRESHALL||Ignore the dirty rectangle list and update the overlay display completely. The dirty rectangle list is cleared after this.|
|DD_OK||The method succeeded.|
|DDERR_INVALIDPARAMS||One or more of the input parameters is invalid.|
|DDERR_INVALIDOBJECT||DirectDraw received a pointer that was an invalid DirectDraw object.|
|DDERR_UNSUPPORTED||Action not supported.|