WOPupUpButton Question

Hello Everyone,

I was wondering if anyone out there could give me a bit of a hand.  I  
have a WOPopUpButton that has a list bound to it.  The button has an  
object for the binding item called aEvent and a object for the  
selection binding called aSelectedEvent.  I also have various strings  
on the component with various fields from aSelectedEvent bound to  
them.  I was wondering if there is any way once a user selects an  
option from the WOPopUpButton to call a method that will updated the  
strings on the page in addition to doing some other things behind the  
scenes?

Thanks for you help in advance?

Regards,
Jeff