How to detach and re-attach an event #123

If, for any reason, you want to detach (remove) the code you have written in an event handler, you have to set the event handler to nil.

procedure TForm1.Button1Click(Sender: TObject) ;
  ShowMessage('Who clicked?') ;
  //remove event handler from event
  Button1.OnClick := nil;

To re-assign the procedure Button1Click to the button's OnClick event, you should use:

Button1.OnClick := Button1Click;
Author: Shlomo Abuisak
Contributor: Shlomo Abuisak
Added: 2009/11/05
Last updated: 2009/11/05