Handling of window opening

1) How to handle opening of a window, which belongs to another process (separate application)? The window has unique title, but not unique class. I need more intelligent way, than just calling FindWindow() from infinite loop
2) How can I monitor and handle closing/terminating of that window, after I found it?

If you need your application to be notified when another window has been created or destroyed, you'll need to use a hook, since you've already ruled out polling using FindWindow.

Yes, already digging in this direction.
http://www.codeproject.com/system/hooksys.asp

Thanks!