The IDirectDraw2::GetGDISurface method retrieves the DirectDrawSurface object that currently represents the surface memory that GDI is treating as the primary surface.
HRESULT GetGDISurface(
LPDIRECTDRAWSURFACE FAR *lplpGDIDDSSurface
);
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_NOTFOUND |