CODE: XT

Riddle~

Assigning ActionScript classes to MovieClip library assets has changed the way we develop user interfaces. Components add behavior directly to a display element, combining function with the design. The ability to extend the MovieClip class simplifies relationships and allows for powerful display objects that can be reused. But it can only be achieved through the linkage of a MovieClip in the library. TextFields and Buttons (Flash native Buttons, not to be confused with other component Buttons) are exempt, as well as a very important MovieClip: the root.

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