Detecting AddHandler in VB.NET
I found this while perusing the newsgroups for awhile...
An event is basically a mask for a delegate - when you declare an event, a hidden delegate type is created that can take methods with the same signature as the event, and a hidden variable of that delegate type is created. So if you know that variable name (hint: event name appended with "Event") you can access the delegate and get a list of the delegates (handlers) that were added to it.
Module Module1 Sub Main() Dim c As New c1() c.goo() End Sub End Module Class c1 Event foo() Sub goo() AddHandler foo, AddressOf moo AddHandler foo, AddressOf moo MsgBox(fooEvent.GetInvocationList().Length()) End Sub Sub moo() End Sub End Class