The IDirectDrawClipper::GetHWnd method retrieves the window handle previously associated with this DirectDrawClipper object by the IDirectDrawClipper::SetHWnd method.
HRESULT GetHWnd(
  HWND FAR *lphWnd  
);
 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 | 
  Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  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.