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Visual Basic 2015 Unleashed
book

Visual Basic 2015 Unleashed

by Alessandro Del Sole
July 2015
Intermediate to advanced content levelIntermediate to advanced
1300 pages
87h 27m
English
Sams
Content preview from Visual Basic 2015 Unleashed

Registering for Events: AddHandler and RemoveHandler

To provide your applications the capability of intercepting events raised from any object, you need to register for events. Registering means giving your code a chance to receive notifications and to take actions when it is notified that an event was raised from an object. To register for an event notification, you use the AddHandler keyword that requires two arguments: The first one is the event exposed by the desired object, and the second is a delegate pointing to a method executed when your code is notified of an event occurring. The code in Listing 15.1 shows an example using a System.Timers.Timer object.

LISTING 15.1 Registering and Catching Events

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ISBN: 9780134196664Purchase book