prevent CMD+Q default action

gistfile1.as

import mdm.Application;

import mx.controls.Alert;
import mx.events.CloseEvent;
//
// when application starts
// enable exit handler
// and route exit event to custom handler
// to get user action
//
private function initApp():void
{
	mdm.Application.enableExitHandler();
	mdm.Application.onAppExit = myExitHandler;
};
// 
// called when application is to quit
// e.g. as results of CMD+Q
//
private function myExitHandler():void
{
	mx.controls.Alert.show("Do you want to quit?", "EXIT", Alert.YES | Alert.CANCEL, this, closeHandler);
};
//
// if YES then exit
//
private function closeHandler(event:CloseEvent):void
{
	if(event.detail == Alert.YES)
	{
		mdm.Application.exit();
	} else 
	{
		// nothing
		return;
	}
}