Definition

event handler

An event handler is a callback routine that operates asynchronously and handles inputs received into a program (events). In this context, an event is some meaningful element of application information from an underlying development framework, usually from a graphical user interface (GUI) toolkit or some kind of input routine. On the GUI side, events include key strokes, mouse activity, action selections, or timer expirations. On the input side, events include opening or closing files and data streams, reading data and so forth.

Some software architectures operate almost entirely by producing, managing, and consuming events. Nearly all software architectures must include at least some event handling capabilities, if only to deal with out-of-bounds conditions and errors.

This was last updated in September 2007

Continue Reading About event handler

Dig Deeper on Event-driven architecture, CEP and operational intelligence

PRO+

Content

Find more PRO+ content and other member only offers, here.

Join the conversation

1 comment

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

The image associated with the BMP lifecycle free download guide thing, is actually two images put on top of each other. There's a normal one of just the normal ad image and there's a smaller image in the top right corner that is a folded corner to some paper giving the illusion that it is actually one single image, when it isn't.

you need to fix this

Cancel

-ADS BY GOOGLE

File Extensions and File Formats

SearchSoftwareQuality

SearchCloudApplications

SearchAWS

TheServerSide.com

SearchWinDevelopment

DevOpsAgenda

Close