VS 2008 Have the user resize the tab control during runtime

I don't know the proper words, but let me explain my question;

If you take a normal windows file explorer.exe, on the left side you have a treeview and on right is a listview.

If you hover your mouse just inbetween these two controls your mouse changes in a littel pike with two arrows on the right and left size to resize it.

Looks a bit like: <-|->

I have a simelair situation in my Form, and I was wondering how to do that!, Both my treeview and listview are in a table layout panel. But I don't see those 'resize gribs'.

My listview and treeview are 'dock as filled' in my table layout panel.

Thanks for your help!