Make a progress bar control behave more like a windows equivalent

[Dimitrie O. Paun]

On Tue, 5 Feb 2002, Dmitry Timoshkov wrote:

> Hello.
> 
> According to my test application, progress bar control always does
> InvalidateRect() if it wants to repaint itself. It is smart enough
> whether or not invalidate background. Probably other comctl32 controls
> need to be fixed in respect of this.

That's a good point. When I wrote the Progress Bar & Up Down Controls way
back when, I did the repaint thingy as other controls were doing. So I
think this style simply got propagated through the controls without good
reason, other than "others do it too".

--
Dimi.