This is one of the items that is tested in your Windows 8 App when you use the WACK.

If you are in Southern California, please email this post for more information on getting a token for your app by June 30, 2012!

 

Passes the Windows App Certification Kit (WACK) tests

To give your app the best chance of getting certified, validate and test it on your computer using the Windows App Certification Kit.

Reference (HTML)

http://msdn.microsoft.com/en-us/library/windows/apps/hh694081.aspx

Reference (XAML)

http://msdn.microsoft.com/en-us/library/windows/apps/hh694081.aspx