Detect the button on android, windows, linux, neco. OpenFL

keyboard_event_openfl

import flash.ui.Keyboard;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.Lib;

public function new() 
{
    super();	
    #if (cpp || neko)
    Lib.current.stage.addEventListener (KeyboardEvent.KEY_UP, stage_onKeyUp);
    #end
}

#if (cpp || neko)
private function stage_onKeyUp (event:KeyboardEvent):Void 
{
    if (event.keyCode == Keyboard.ESCAPE //Keyboard.BACK) {
        event.stopImmediatePropagation();
        //Your code here
    }
}
#end