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Chapter 5 - Control Panel Extensions / Control Panel Extensions Reference

Control Panel Extension-Defined Routines

This section describes the routines you'll need to define in order to write a control panel extension. You need to write routines that respond to panel-specific request codes. The panel-specific request codes request your control panel extension to perform various actions. These actions include:

• returning an item list describing the panel's items and setting up the initial values of these items
• receiving and handling events in the panel
• getting and setting a panel's settings

Your control panel extension-defined routines should always return result codes of type ComponentResult. If a routine succeeds, it should return noErr.

See "Dispatching to Control Panel Extension-Defined Routines" beginning on page 5-9 for a description of how you call these routines from within a control panel extension.

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Subtopics

Managing Panel Components

Handling Panel Events

Managing Panel Settings