Assembly : WindowsBase (dans windowsbase.dll)
The object on which the event is being handled.
Event data for the event to deliver.
The list of listeners being delivered is the underlying collection of listeners as established with calls to the AddListener implementation of that manager class, if you used ProtectedAddListener in the implementation. (AddListener is not part of an interface or class contract; AddListener is the suggested name for the method of your manager class that calls ProtectedAddListener and adds WeakEvent pattern listeners for the event.
ProtectedAddListener adds listeners to a single list. If your manager implementation maintains more than one list of listeners per event, do not use DeliverEvent or ProtectedAddListener. Instead, your implementation should create its own WeakEventManager.ListenerList instances, AddListener should add listeners to the appropriate list, and events should be delivered to the appropriate listener list by calling DeliverEventToList.