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Essentially, the parent window is sent WM_HSCROLL messages with relevant notifications including TB_THUMBTRACK. <br />
You tried to handle WM_HSCROLL for parent window ?<br />
<br />
-MAHESH<br />

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Essentially, the parent window is sent WM_HSCROLL messages with relevant notifications including TB_THUMBTRACK.
You tried to handle WM_HSCROLL for parent window ?

-MAHESH


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Well I had completely overriden painting with OnPaint(). &nbsp;But I suppose I will use custom draw for the sake of getting that 'core functionality'.<br />
<br />
Thanks
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Well I had completely overriden painting with OnPaint().  But I suppose I will use custom draw for the sake of getting that 'core functionality'.

Thanks

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So I have a custom CSliderCtrl in which I do all the drawing for it. &nbsp;The problem is that my custom drawn thumb is slightly bigger then the standard thumb so when you move the thumb it leaves graphics artifacts since the entire thumb area is not getting invalidated.<br />
<br />
I need to get a message (within the CSliderCtrl itself and not its parent) everytime the thumb moves so I can invalidate the appropriate areas. &nbsp;I have tried OnChildNotify() and ON_WM_VSCROLL_REFLECT(), neither seems to get regular messages as the thumb moves. &nbsp;I have even tried catching WM_VSCROLL and WM_HSCROLL in PreTranslateMessage. &nbsp;Obviously I am not aware of what messages are truly sent by a CSliderCtrl.<br />
<br />
So how can I have the CSliderCtrl know when it's thumb has moved?
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So I have a custom CSliderCtrl in which I do all the drawing for it.  The problem is that my custom drawn thumb is slightly bigger then the standard thumb so when you move the thumb it leaves graphics artifacts since the entire thumb area is not getting invalidated.

I need to get a message (within the CSliderCtrl itself and not its parent) everytime the thumb moves so I can invalidate the appropriate areas.  I have tried OnChildNotify() and ON_WM_VSCROLL_REFLECT(), neither seems to get regular messages as the thumb moves.  I have even tried catching WM_VSCROLL and WM_HSCROLL in PreTranslateMessage.  Obviously I am not aware of what messages are truly sent by a CSliderCtrl.

So how can I have the CSliderCtrl know when it's thumb has moved?

CSliderCtrl notification messages.

Kernel and system programming is the process of creating the software necessary for a computer or device to function and operate other programs. Some operating systems (such as Microsoft Windows) are proprietary, but others, such as the various Linux distributions, are open source.