Client Side Event name needed

Hi,

I need to implement functionality client side such that:
when user selects( Highlights) any file or folder in FileVista control my client side code changes value of one of asp.net labels.
I'd like to know how I can plug in 
code like this.

Many Thanx

Hi Sergei,
One of our customers posted a way to do a similar thing, please see
Obtaining the selected file in server side code.