Yes, It will work on anything.
Run snipping tool first and make sure it's not in Capture mode by pressing <ESC> Key then go to metro screen/Pop Up Menu or whatever you want to capture, hold down <CTRL> key and press PrintScreen, the screen becomes greyed out, just click and drag to capture. Press <ESC> if you want to cancel or start over again.
So the key is: CTRL+PrintScreen to enter capture mode (Screen greyed out) and ESC to get out of capture mode
Hope this helps !!!

Note
The above post from Topgundcp makes my post below unnecessary. As I am so used to this third party tool I am telling about I notice now I have not searched enough for how to do it with Snipping Tool. Anyway, as the FS Capture has and can so much more than the Snipping Tool, I leave my post here.
Hi Phxheat13, welcome to the Eight Forums.
I have searched an answer for this, found nothing. I use a third party solution
Fast Stone Capture for this. It costs about $20 but up to version 5.3 it was and is free.
FS Capture official site:
FastStone Screen Capture - The Best Screen Capture Software
Free FS Capture v. 5.3:
Old Version of FastStone Capture 5.3 Download - OldApps.com
Even with FS Capture there's an undocumented trick to get screenshots from Start Screen or Windows App screen, I found it out accidentally:
When on Start Screen or on a Windows App, click the appropriate keyboard shortcut to launch FS Capture
Now bring pointer to the upper left corner where you normally would get the list of open but suspended apps and click the mouse button:

If you selected
Capture Rectangle Region (keyboard shortcut CTRL + PRINT SCR) you will now see the FS Capture crosshair and can capture selected rectangle region:

If you selected
Capture Window (keyboard shortcut ALT + PRINT SCR) you will now see the red window selection borders surrounding your Start Screen or Windows App screen. Pressing the mouse button now captures the Start Screen or App window and brings you to editor where you can modify and save your screenshot:

Easy and fast. If you go for the free version 5.3, it need to be run in compatibility mode otherwise the editor will not be able to save your modifications. Set compatibility to
Windows XP:

Hopefully this helps you at least a bit.
Kari