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 these posts for more information on getting a token for your app by June 30, 2012!

 

Properly handles activation from contracts, secondary tiles, and notifications

When an app is activated from a share contract, search contract, tile, or notification, parameters and data are passed to your app. Your app should retrieve the data at launch and act upon it.

Reference (HTML)

http://msdn.microsoft.com/en-us/library/windows/apps/hh465102.aspx

Reference (XAML)

http://msdn.microsoft.com/en-us/library/windows/apps/hh465102.aspx