Expose An Event from your User Control
A.ASCX:
Public Event athandler myevent;
In Your Control's Event Handler, Do
IF (MyEvent! = NULL)
Myevent (sender, evenetargs.empty);
// The syntax for vb.net is raiseevent
.
IN your aspx page:
In somehandler, you can do anything you want
You might need to consider to use a custom delegate and Eventargs, See
Http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpcondefiningcustoment.asp