| DirectX SDK | 
The IDirectDraw7::GetGDISurface method retrieves the DirectDrawSurface object that currently represents the surface memory that GDI is treating as the primary surface.
HRESULT GetGDISurface( LPDIRECTDRAWSURFACE7 FAR *lplpGDIDDSSurface );
If the method succeeds, the return value is DD_OK.
If it fails, the method can return one of the following error values:
| DDERR_INVALIDOBJECT | 
| DDERR_INVALIDPARAMS | 
| DDERR_NOTFOUND | 
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 98.
  Header: Declared in ddraw.h.