### IDirectDrawSurface3::AddOverlayDirtyRect

This method is not currently implemented.

HRESULT AddOverlayDirtyRect(

LPRECT lpRect

);

##### Parameters

lpRect
  Address of the RECT structure that needs to be updated.

##### Return Values

If the method succeeds, the return value is DD_OK.

If the method fails, the return value may be one of the following error values:

DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_INVALIDSURFACETYPE
DDERR_UNSUPPORTED

##### See Also

IDirectDrawSurface3::UpdateOverlayDisplay