Panel Event Sequencing relative to event handlers

[RationalPolymer]

When an "event" occurs within "Panel", it is possible to attach an external action (script) that will be invoked at some time related to the "event" (before, during, after). I have two questions:

a) at what point (in time) related to an 'event' is an 'event handler' (external action) invoked (again: before, during,after)?

b) can an 'event handler' replace the 'event' (or at least the 'action of the event')?

 

[IgorG]

a) after
b) not sure that I have understood you correctly. Please clarify a little bit.

 

[RationalPolymer]

I was wondering whether the action of an "event" could be replaced by the action of an "event handler". From what I have seen in the documentation, the answer to that question appears to be "no".