Event Handler Delegate
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public delegate void InvalidateEventHandler(System::Object ^ sender, InvalidateEventArgs ^ e);
public delegate void InvalidateEventHandler(object sender, InvalidateEventArgs e);
public delegate void InvalidateEventHandler(object? sender, InvalidateEventArgs e);
type InvalidateEventHandler = delegate of obj * InvalidateEventArgs -> unit
Public Delegate Sub InvalidateEventHandler(sender As Object, e As InvalidateEventArgs)
The source of the event.
When you create an InvalidateEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about handling events with delegates, see Handling and Raising Events.
Gets an object that represents the method represented by the specified delegate.