New to AS3, how does "this" work now?

[tfletch]

function myButtonAction(eventObject:MouseEvent) {
    trace("click");
}
this.addEventListener(MouseEvent.CLICK, myButtonAction);

I have this on the timeline inside a movieclip, but when I try and click it, it does not work.

[senocular]

Your code and setup is correct. It should work. Double check your work; publish settings, and code location.