[Bug 7404] ShowWindow(SW_MINIMIZE) should not generate a WM_PAINT message

http://bugs.winehq.org/show_bug.cgi?id=7404

P. Quist  changed:

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--- Comment #19 from P. Quist   2008-03-20 18:24:56 ---
Well just a quick word, I've been trying to get the source of this damn bug for
2 days now, and I can't find it.

There's a couple of things that the minimize does right, and it's perfectly
traceable in the code, but the following sequence seems to be created out of
thin air:
- WM_PAINT
- WM_NCPAINT
- WM_ERASEBKGND

When I tried to block wm_paints from begin getmessaged, it screwed up a lot of
things, so if someone knows where it's coming from, be my guest to hint away.
But I put traces and debug messages pretty much everywhere and it didn't get me
any closer.

I did manage to prevent a false WM_CANCELMODE to be sent, which is sent in
dlls/winex11.drv/event.c :: EVENT_FocusOut, and can be prevented by a simple
if(style is Wm_minimize), but that's totally unrelated.

What I do think is that the WM_PAINT isn't really the source of this particular
problem to be honest, and when someone finds out how to prevent the WM_PAINT
sequence, we should be going around debugging the mfc42 and related calllings.

That's just my take on it anyway, I could be incredibly wrong.

I'm not continuing on this bug, as my vision is pretty blurred now.