honestly, I've never seen anything like that to do drag and drop.
That doesn't mean that it doesn't exist, but I've never seen it.
A quick google search led me here:
http://objectlistview.sourceforge.net/cs/dragdrop.htm[
^]
If you haven't read up on that, I guess I would start there. Or go back to where you got the treelistview object and look at the documentation there.