E

event

In the context of programming, the occurrence of some particular action or the occurrence of a change of state that can be handled by an event sink. For example, the arrival of a message to the SMTP service is an event that can be handled by any number of event sinks.

event sink

An application or COM object that is invoked in response to the triggering of an event.

event source

A process or thread that notifies event sinks that a particular event has occurred.