I know another way. But it's 3 clicks, not one.
1. Go into Explorer.
2. Right click on the drive.
3. Choose Eject.
Might work until someone tells how to program it in a button.
Does anyone know how to make an eject button on the desktop for the CD Burner? My CD Burner's button is recalcitrant and I'd prefer not to have to start up my Nero to eject the disk.