Sending raw notifications (HTML)
You can use raw notifications, a type of push notification, to send short messages from your app's cloud service to an app through Windows Push Notification Services (WNS). Unlike the XML payload of other push notification types (tile, toast, badge), the payload contained in a raw notification is strictly app-defined, and generally is not used to convey UI data.
These topics assume that you have a working knowledge of push notification concepts and terminology.
In this section
You can create and register a background task function for your Windows Store app. This code then runs in response to the receipt of a raw notification, which gives your app functionality when it is not in the foreground.