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Class derived from CScrollBar does not recieve ON_WM_CTLCOLOR!

Posted on 2008-10-14
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Last Modified: 2013-11-20
Ah hello.

I have derived a class from CScrollBar, CMyScroll.  I add a V scrollbar and H scrollbar to my dialog, then link them up via DDX so they are instances of CMyScroll. In the CMyScroll class I handle the OnCtlColor message, in the hope of painting the scrollbar a different colour internally, as opposed to having to have OnCtlColor in the parent dialog

However, this message never gets sent, so my OnCtlColor function never gets called.

I can stick a breakpoint on CMyScroll::PreTranslateMessage, and this gets hit, but not OnCtlColor.

Why is this?

TIA
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Question by:mrwad99
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Zoppo earned 400 total points
ID: 22711543
Hi mrwad99,

this message is sent to the parent window of the control, not to the control itself. It should work with message reflection using the macro ON_WM_CTLCOLOR_REFLECT.

Hope that helps,

ZOPPO
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by:alb66
alb66 earned 100 total points
ID: 22711625
Zoppo is right. Here you can find an explanation on how reflection works:
http://msdn.microsoft.com/en-us/library/eeah46xd(VS.71).aspx
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by:mrwad99
ID: 22711692
Thank you ZOPPO, that now works.

Thanks alb66; I keep meaning to read that link...perhaps if I would have read it earlier I would not have asked this question :o)
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