How to get a Toast Notification when app running in foreground in wp8

[abinamt]

I want to implement the "toast" notification inside my windows phone application. I'm implementing push message's, but I want them to show always. No matter if the application is running or not. The push notification will handle it when the application is closed, but not when it is running. Also if I create a shelltoast manually it won't show. To make it more difficult I can't use any external dll's. I only want to use code. What would be the best way to do this? I already know about the ToastNotificationRecieved event. I want to know how to implement it so that it will show a "toast" like message without using a framework

ShellToast is not able to Show, why?