Hi, if you have a MacBook, above the "delete" key is the eject key (underlined triangle) push and hold until you see the same symbol on the screen and after a few seconds the CD will be ejected.
If you want to get out of Windows click on the red round button in the upper left corner of the window WIN is running in. A drop down menu should appear asking you to suspend the virtual machine. Click on OK and it will shut down. and the next time you start WIN it'll come right back up the way it was setup when you shut it down.
Hope this helps.