how to make a mouseup event called only once during a double click event?

[Techsatish]

how to make a mouseup event called only once during a double click
event?
here double click is made on a tree node in a tree control.The code is
in VB.NET.

I have the code inside mouseup event....in runtime the mouseup is
called twice for the mouse double click over the selected tree node.

I want mouseup event to be called onece



Any ideas?

TIA
Satish