Scrollbar

[confalonieri]

Hi. I'm trying to manage a listbox vertical scroll bar and I have a problem with the function OnVScroll when I drag the scroll box. In OnVScroll(), when the first parameter nSBCode is SB_THUMBPOSITION or SB_THUMBTRACK, the second parameter nPos is expected to indicate the position of the scroll box. nPos (which is a UINT) can be cast to an int, and then I realized that after 32768, (int) nPos is -32768 ! Then, (int) nPos increases up to 32768 and then -32768 again !!! How should I proceed to manage the scroll box position when the range of my vertical scroll bar is over 32768 ? Thanks.

[Tomasz Sowinski]

You should use CWnd::GetScrollInfo instead of parameters passed to WM_VSCROLL. GetScrollInfo supports 32-bit ranges and positions. Tomasz Sowinski -- http://www.shooltz.com