Apple Event Types
Apple events fall into one of several broad categories.
the core Apple events.
• Core Apple events are used by nearly all applications to
communicate. The suite of core Apple events is described in the Apple Event Registry; Apple recommends that all applications support the
core Apple events.
• Functional-area Apple events are supported by applications
with related features. Apple events related to text manipulation for
word-processing applications and Apple events related to graphics
manipulation for drawing applications are functional-area Apple events.
Functional-area Apple events are defined by Apple in consultation with
interested developers and are published in the Apple Event Registry. Apple
recommends that all developers support functional-area Apple events
appropriate for their types of applications.
• Custom Apple events are defined by a developer for use by the
developer's own applications. You should register all of your
custom Apple events with Macintosh Developer Technical Support. You can
choose to publish your Apple events in the Apple Event Registry so that other
applications can share them, or you may choose to keep them unpublished for
exclusive use by your own applications.