Visual Basic® 2010 Unleashed

Handling Events

Events are members that enable objects to send information on their state to the caller. When something occurs, an event tells the caller that that things occurred so that the caller can make decisions on what actions to take. Generally you handle events in UI-based applications, although not always. The .NET Framework takes a huge advantage from delegates to create event infrastructures, and this is what you can do in creating your custom events. In this section you first learn how to catch existing events, and then you get information on creating your own events. This approach is good because it provides a way to understand how delegates are used in event handling.