MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT Reference Manual page 579

If a symbol is already registered to a class, this method replaces it with the new registration.
When a movie clip instance is placed by the Timeline or created using
duplicateMovieClip()
keyword pointing to the object. The constructor function is invoked with no parameters.
this
If you use this method to register a movie clip with an ActionScript class other than MovieClip,
the movie clip symbol doesn't inherit the methods, properties, and events of the built-in
MovieClip class unless you include the MovieClip class in the prototype chain of the new class.
The following code creates a new ActionScript class called
of the MovieClip class:
theClass.prototype = new MovieClip();
See also
MovieClip.attachMovie()
Object.toString()
Availability
Flash Player 5.
Usage
myObject.toString()
Parameters
None.
Returns
A string.
Description
Method; converts the specified object to a string and returns it.
, ActionScript invokes the constructor for the appropriate class with the
,
MovieClip.duplicateMovieClip()
attachMovie()
that inherits the properties
theClass
Object.toString()
or
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