I have two Listviews side-by-side and I want their scrolling behavior to be synchronized. I.E. When the user drags the vertical scroll bar up or down on one list view, I would like the other listview to do the same.

I have already hooked the two listviews and trapped the WM_VSCROLL messages, which are fine for when the user clicks the "Scroll Up" and "Scroll Down" arrows on the scroll bar. But what messages can I trap to detect when the user drags the scrollbar with the mouse?

Thanks