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Chapter 14. Learning ActionScript > Using ActionScripts

Using ActionScripts

ActionScript is an event-driven language, meaning scripts are executed as the result of certain things that occur during the course of the movie playback. An event is something such as the playhead moving from one frame to another, a mouse moving or having its button pressed, or a key being pressed. When these types of events occur, messages are sent to the movie and objects in the movie, and if scripts are in the appropriate places, the messages are sent to the scripts.

Scripts that react to event messages are called handlers, because they "handle" a message by executing one or more commands in response to the message.


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