I am looking for the name of those square info panes you see pop up above the system tray. They slide up, stay for a moment and slide back down. MSN messenger has them, you'll notice them whenever someone signs in or messages you when the main windows has been minimized to the system tray. I'd be more precise if I knew what they were called. They're not to be confused with the standard BalloonToolTip windows I asked about before.
In order for me to do a little research on how to implement such a beast, I need to know its name first because Google is (at least for now) still lacking a neural interface.

Thanks in advance!