Middle Click in AS3

programming flash
1

Hi !!! I’m looking for the way to detect the middle click with AS3.
I know there is a MouseEvent.MIDDLE_CLICK, but it’s only for AIR:

http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/events/MouseEvent.html#MIDDLE_CLICK

Why Flash didn’t put that function for Flash Player too???

How can we detect the middle click then?
In AS2 we can write something like this:

if (Key.isDown(4)) {
trace(“Middle Click!”);
}

But in AS3???

Thanks!!
Enrique.