Eric,
What about grabbing some of the code out of the ClassBrowser source? The only thing I don't like about that one though is that it blanks the contents of the two neighboring ActiveX controls so you can't really resize the split to the size of the data without it taking a couple of tries. I looked at fixing this problem a while back, but didn't fiddle with it long enough to get it all the way working. It is possible, Explorer allows you to see the treeview and listview content while you are dragging the splitter.
>We used to have a class in Downloads that behaves like the resizer bar that sits between a treeview and a grid\listbox and allows drag style resizing of the 2 adjacent objects in a horizontal fashion. Does anyone have it or know of one like it?