Controlling the Lock Screen’s Background and Notification Area
Beginning with the Windows Phone 8 SDK, you have the opportunity to integrate your app with the phone’s lock screen, which includes setting of the lock screen background image, posting notification text to the notification area, and displaying a numeric count field (see Figure 13.9). Apps that integrate with the phone’s lock screen are known as live apps.
To view the lock screen when using the Windows Phone emulator, press F12 twice. Pressing F12 once simulates locking the device via the power button. Pressing F12 again ...