The IDirectDrawSurface3::GetClipper method retrieves the DirectDrawClipper object associated with this surface.
HRESULT GetClipper(
LPDIRECTDRAWCLIPPER FAR *lplpDDClipper
);
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_NOCLIPPERATTACHED |