The act of broadcasting the message is called raising the event. You declare events within classes, structures, modules, and interfaces using the Event keyword, as in the following example: Event AnEvent(ByVal EventNumber As Integer)Īn event is like a message announcing that something important has occurred. This section describes the terms and concepts used with events in Visual Basic. If a user cancels the sort, your application can send a cancel event instructing the sort process to stop. Say, for example, that your application performs a sort task separately from the main application. Events also allow separate tasks to communicate. For example, when a user clicks a control on a form, the form can raise a Click event and call a procedure that handles the event. While you might visualize a Visual Studio project as a series of procedures that execute in a sequence, in reality, most programs are event driven-meaning the flow of execution is determined by external occurrences called events.Īn event is a signal that informs an application that something important has occurred.
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