April 2002
Intermediate to advanced
688 pages
19h 51m
English
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Name
AddHandler Statement
Syntax
AddHandlerNameOfEventSender, AddressOfNameOfEventHandler
-
NameOfEventSender(required; String literal) The name of a class or object instance and its event, such as Button1.Click
-
NameOfEventHandler(required; String literal) The name of a subroutine that is to serve as the event handler for
NameOfEventSender
Description
Binds an event handler to a built-in or custom event. This makes it possible to bind several event handlers to a single event.
NameOfEventSender takes the form class.event or object.event.
You can stop handling events defined by the
AddHandlerstatement by calling theRemoveHandlerstatement.
Example
For an illustration, see Section 7.2.3 in Chapter 7.
Programming Tips and Gotchas
The Handles keyword can be used to receive event
notification for the lifetime of an object. In contrast,
AddHandler and RemoveHandler
can be used to dynamically add and remove event notification at
runtime.
See Also
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.