Getting the event handler associated with a given event

[Gustavo L. Fabro]

Greetings.

Is there a way to do this? I have a case on my program that I associate an
event with a different event handler, something like:

form->Closed += new System::EventHandler(this,ViewFormClose);

Is there any way at all to get the previous EventHandler associated to this
event, so I can "restore" it later? Something like

System::EventHandler* previousFormClose;
previousFormClose += form->Closed;

//after some conditions, restore it using
//form->Closed += previousFormClose

?

This code will compile, but won't link... Any clues?