Trying to understand ETO button bound method

Scripting
2

Hi @Jun_Wang,

sender and e are standard parameters that are passed to any event handler, where:

  • sender contains a reference to the control/object that raised the event .
  • e contains the event data. The contents of e depend on the event that was triggered.

More info: Handling and raising events - .NET | Microsoft Learn

This is true. The sample code is adding an event handler (e.g. delegate) to the event’s list of handlers. An event can notify more than one event handler.

– Dale