title: Windows 8.1 : Create "silent" toast notification
body: <p>I'm working on a Windows app and integrated Toast notification in it. Paired with an AWS SNS service, it's working fine, I can successfully receive my notifications.</p>
  
  <p>My notifications are used to fire events when the app is launched, it's not designed for final user. For this reason, I don't need any banner or display for these notifications: only handle  the event in the app.</p>
  
  <p>My issue is, when the app is killed, Windows displays a banner (top right corner) for any new notification. I found a way to disable banners directly in the OS, but I would like a solution when pushing the notification (backend side).</p>
  
  <p>I already did it for iOS, kind of 'silent' notification, without any alert, sound or badge, but can still be handled by the OS.</p>
  
  <p>I would like to know if there is any way to do that on Windows too? Like any extra arguments I missed or a dedicated template for that.</p>
  
  <p>Thanks</p>