Determine if an event has been attached to yet

Question

I have two objects - one that contains some code with will fire an event, and one that contains the handler for that event. I can\'t \"AddHandler\" in the Load of the first

Answer 1

According to the responses here: http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/9ec8ff1c-eb9b-4cb3-8960-9cd4b25434f2 (which seem to work according to my testing), a check for existing event handlers is done upon calling RaiseEvent. If you do not want to raise an event and just need to check to see if any handlers are attached, you can check the value of a hidden variable called Event like:

Public Event Foo As ActionFoo

If FooEvent IsNot Nothing Then...