If you need to, for example, attach a MOUSE_MOVE event to the application stage from a component that doesn’t include a creationComplete override, you have two options.

Wait for Event.ADDED_TO_STAGE

addEventListener( Event.ADDED_TO_STAGE, function(e:Event):void
{
stage.addEventListener( MouseEvent.MOUSE_MOVE, myMouseMoveEvent );
});

Attach Through the System Manager Object

The system manager parents all displayable elements within the Flex application. It is an elegant way of accessing the stage through custom flex components which have not yet been added to it.

systemManager.stage.addEventListener( MouseEvent.MOUSE_MOVE, myMouseMoveEvent );

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