You declare your own events by using the
Event keyword. This keyword requires you to specify the event name and eventually a delegate signature. Although not mandatory (
Event allows specifying no arguments), specifying a delegate signature is useful so that you can take advantage of
AddHandler for subsequently intercepting events. The code in Listing 15.3 shows an alternative implementation of the
Person class in which an event is raised each time the
LastName property is modified.
Public Class Person Public Event LastNameChanged(ByVal sender As Object, ByVal e As EventArgs) Public Property FirstName As String Private ...