[Bug 2082] DirectDraw games only showing black screen

https://bugs.winehq.org/show_bug.cgi?id=2082

--- Comment #141 from Ken Thomases  ---
(In reply to comment #140)
> If we're reasonably sure that there's always a meaningful device window,
> then we can change the extension to just provide a function:
>
> BOOL wglEnableFullScreenWINE(HDC hdc, BOOL enable);

After thinking about it some more, I've changed my mind about this suggestion. 
Such a function implies that the full-screen state can be toggled on or off at
any point during the DC's life.  Really, we want it set immediately upon the DC
being obtained and cleared just before it's released.  So, it should be part of
obtaining and releasing it.

My initial idea was a custom MakeCurrent, but I don't think that works well. 
The DC needs to be "special" for operations that precede making the context
current.