Re: WM_CTLCOLORBTN message

Constantin Bryzgalin wrote:
> it's really a problem with most common controls: they don't deal well
> with transparency. what you really need to do is capture a part of the
> background picture that lies underneath the radiobutton, create a
> pattern brush from it and let it use that to 'paint' background.

That's what v6 "themed" common controls do - they send WM_PRINTCLIENT to 
draw the parent background into a buffer, then composite the control on top. 
Unfortunately, it doesn't work properly with all themes. For example, the 
Zune theme doesn't send WM_PRINTCLIENT when compositing buttons, so they 
have a nasty light-coloured edge when shown on anything other than the 
default dialog background :(

-- 
Jim Barry, Microsoft MVP
 



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