This topic needs more general discussion of callbacks and their use, with simpler examples that explain the concept of a callback. I am rewriting most of this article to include much more information.
Example
Example: return
Well, why these functions return int, when counter assumes they return void?
Example: count
Why 9 is before 10, in hex?
- Fixed: temporay loss of sanity. Dysprosia 12:50, 15 Dec 2003 (UTC)