CompuServe Thread

Lei, >> I am using CMyListBox : public CListBox and subclass the listbox template control ID within the view. While I am handle OnVScroll, SetScrollPos don't work at all.(this is a windows scroll bar, not a control scroll bar). It seems like I need PostMessage to set scroll positions. I just cann't find the right message to do so. << I assume that what you've subclassed is a listbox with its own scroll bar (so you get WM_VSCROLL messages when you click on the buttons, etc.). If you've done so, then you should be able to handle WM_VSCROLL without any problem, as long as you call the base class OnVScroll as well, to let the listbox do its own handling. If you're getting WM_VSCROLL and attempting to change the scroll position of the listbox's scroll bar yourself, you might very well be making internal variables the listbox is keeping to specify its state invalid. I can't really suggest any way to change the listboxes scroll position which might not mess this up, besides possibly sending it LB_SETSEL or LB_SETTOPINDEX messages to position particular items and thus force the listbox where you wish. Hope this information helps. Tarn Faulkner Microsoft Developer Support