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Leopard Guides: Carbon
Events are high-level messages sent to applications by the operating system. For example, when the user clicks the mouse, types a character, or chooses a menu command, Mac OS X notifies the appropriate application by means of an event; when a window needs to be redrawn, moved, or resized, the application receives an event telling it to perform the operation; when a program becomes the active (foreground) application or moves to the background in favor of another, the program receives an event informing it of the fact. When an application receives an event, the application's task is to respond appropriately.
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Apple Events Programming Guide (HTML) (PDF)
Provides conceptual information and programming examples for working with Apple events.
 2007-10-31
Carbon Event Manager Programming Guide (HTML) (PDF)
Essential information for implementing Carbon events.
 2005-07-07
Supporting Unicode Input (HTML) (PDF)
Introduces international text in Mac OS X and lists the tasks an application needs to perform.
 2005-07-07
Understanding Text Input and the Text Services Manager in Carbon (HTML) (PDF)
Discusses keyboard input, including Unicode, and explains how events are routed and handled.
 2002-12-11
Using Ink Services in Your Application (HTML) (PDF)
Explains how Ink Services works and how to customize handwriting recognition.
 2003-07-24