- Event sender.
- Event arguments.
The HandleBox.ChildAttached event utilizes this delegate:
Event data is passed via the Gtk.ChildAttachedArgs parameter.
To attach a Gtk.ChildAttachedHandler to an event, add the ChildAttachedHandler instance to the event. The methods referenced by the ChildAttachedHandler instance are invoked whenever the event is raised, until the ChildAttachedHandler is removed from the event.