Windows+Pause/Break

[Alex100]

One of the keyboard shortcuts I use most often is Windows+Pause/Break. But my Virtualbox guest apparently is not "hearing" the Pause/Break part. How can I use that shortcut in my Virtualbox guest?

(Windows, Windows+E and Windows+F all work for their respective functions. My host is Mac OS 10.10.2. Virtualbox 4.3.26. Guest is Windows 7 Enterprise SP1 64-bit. Guest Additions are installed. I am using a PC USB keyboard. I know how to get to the "View basic information about your computer" window. My question is specifically about how to get the keyboard shortcut to work.)

Thanks!

Alex