The event class for the receiver.
- macOS 10.0+
The event class (a four-character code) for the receiver, or 0 if an error occurs.
The receiver must be an Apple event. An Apple event is identified by its event class and event ID, a pair of four-character codes stored as 32-bit integers. For example, most events in the Standard suite have the four-character code
'core' (defined as the constant
AE, a subframework of
Application). For more information on event classes and event IDs, see Building an Apple Event in Apple Events Programming Guide.