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?