[Bug 41926] Zafehouse demo crashes with Call from 0x7b43c14c to unimplemented function ddraw.dll.GetSurfaceFromDC , aborting

https://bugs.winehq.org/show_bug.cgi?id=41926

--- Comment #14 from Dmitry Timoshkov  ---
(In reply to Henri Verbeet from comment #13)
> > > Exchanging first 2 params and passing HDC by value make it work.
> >
> > The API returns an HDC (GetObjectType() returns 3 == OBJ_DC) in the provided
> > storage, not an iface pointer though. Also, as as side effect the API call
> > invalidates the passed in dd7 interface, so all further calls to it crash
> > here.
> >
> > Not sure how to interpret the results.
>
> It looks like it's supposed to be something like this:
> HRESULT WINAPI GetSurfaceFromDC(HDC dc, IDirectDrawSurface **surface,
>
> HDC *device_dc);

Confirming, changing the 2nd parameter to a pointer to an interface fixes
all the crashes here, and the returned values look pretty sane.