| DirectX SDK | 
The IDirectDrawSurface7::GetFlipStatus method indicates whether the surface has finished its flipping process.
HRESULT GetFlipStatus( DWORD dwFlags );
If the method succeeds, the return value is DD_OK.
If it fails, the method can return DDERR_WASSTILLDRAWING if the surface has not finished its flipping process, or one of the following error values:
| DDERR_INVALIDOBJECT | 
| DDERR_INVALIDPARAMS | 
| DDERR_INVALIDSURFACETYPE | 
| DDERR_SURFACEBUSY | 
| DDERR_SURFACELOST | 
| DDERR_UNSUPPORTED | 
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 98.
  Header: Declared in ddraw.h.