Explicitly Call the Event Hnadler

Hi,
On MasterPage I used Page attribute and call FindControl for tab controls on the content page. Lets say  I get these two tab control on the content page tabID1 & TabID2. Lets assume that..TabID1 implement ActiveIndexChanged event and TabID2 doennot  implement that event.
Now I want to check that if the tab control is implemet the ActiveIndexChanged event then explicitly call that event. I want to write this method generic for tabs on any content page.
1) How do I check that "The server control implement specific (say ActiveIndexChanged) event , If I have Controls (say Tab) instance?
2) How do I call the implemented event explicitly (say ActiveIndexChanged).
 
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