A method that will handle the events associated with the value changes of any properties.
public delegate void ChangeEventHandler( object sender, ChangeEventArgs e );
Public Delegate Sub ChangeEventHandler( sender As Object, e As ChangeEventArgs )
An object of any type that triggers an event associated with the property's value changes.
An object of the ChangeEventArgs class that provides data for the events associated with the property's value changes.
When you create a ChangeEventHandler delegate, you identify the method that will handle the events. To associate the events with your event handler, add an instance of the delegate to the events. The event handler is called whenever the events occur, unless you remove the delegate.