TreeView: right-click

And since it's late and my brain isn't working well right now, one more...

I have a TreeView control on a form with a bunch of nodes displayed.  If I
'left-click', the treeview highlight shows on the item I clicked.  However,
if I 'right-click', it doesn't.  How do I change the TreeView's behavior so
that the 'right-click' moves the highlight just like the 'left-click' does
(the same behavior that happends in Windows Explorer), please?

Peter