public class MessageController
{

    public MessageController()
    {

    }

    public static void sendErrorMessage(String errorMessage)
    {
        NativeObject.sendMessage(errorMessage, "error");
    }

    public static void sendInfoMessage(String infoMessage)
    {
        NativeObject.sendMessage(infoMessage, "info");
    }
}

var messageController:NativeObject = new NativeObject();
messageController.source = "controller.MessageController" ;
messageController.singleton = true;
messageController.debug = false;
messageController.addEventListener(FaultEvent.FAULT, onFileControllerFault, false, 0, true);

messageController.subscribe("info", infoMessageHandler);
messageController.subscribe("error", errorMessageHandler);

messageController.start();

public void start()
{
NativeObject.sendMessage("test message", "info");
}