Simple AIR Notification App (noob)

Question

hello all, I would like to create a simple AIR app that show's a notification on the bottom right of the users screen. this app won't show all of the time, it will just show if I push a new notification to the users computer. I am doing this in Dreamweaver. It will open on Windows XP computers only.

So far I have found out how to show a notification window with my html file:

notification.load( new air.URLRequest( HTML_SOURCE ) );

What I am not clear on is:

1. how to have this happen automatically on login.
2. how the AIR app can check if a new msg is available.
3. how best to exit the app

Thanks for any help!