The IDirectDrawSurface4::GetBltStatus method obtains the blitter status.
HRESULT GetBltStatus(
  DWORD dwFlags  
);
 If the method succeeds, that means a blitter is present, the return value is DD_OK.
If the method fails, the return value is DDERR_WASSTILLDRAWING if the blitter is busy, DDERR_NOBLTHW if there is no blitter, or one of the following error values:
| DDERR_INVALIDOBJECT | 
| DDERR_INVALIDPARAMS | 
| DDERR_NOBLTHW | 
| DDERR_SURFACEBUSY | 
| DDERR_SURFACELOST | 
| DDERR_UNSUPPORTED | 
| DDERR_WASSTILLDRAWING | 
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in ddraw.h.
  Import Library: Use ddraw.lib.