import flash.desktop.NativeApplication

import flash.events.KeyboardEvent;

import flash.ui.Keyboard;

 

NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);

 

function onKeyDown(e:KeyboardEvent):void{

    if(e.keyCode == Keyboard.BACK){

        // 

    }

    else if(e.keyCode == Keyboard.HOME){

        // отменить нельзя

    }

    else if(e.keyCode == Keyboard.MENU){

        //

    }

}