Treeview Before Expand Event

Hi
I am stuck with a problem,please help me.
I have a requirement in which i have some nodes in a treeview and When the treeview is populated the first time I do not populate the child nodes.I only add dummy nodes in the begining. Only when the user clicks on the "+" sign i delete the dummy node and add the actual child nodes. While doing this,as soon as the user clicks on the parent node a messagebox is fired asking the user whether to continue. The coding for the messagebox is writen in the expand event of the treeview .The problem is when the user clicks on the "+" sign the messagebox is fired but at the same time the dummy node which was added as the child node is also visible(which is not favourable). So please suggest a solution where I can fire the message box before the child node(Dummy Node) is visible. Is there anything through which i can access the before expand event of a treeview node.
Thanks in Advance
Regards
Sravanthi
[969 byte] By [sravanthi] at [2007-11-15 16:17:24]