I've got a Windows 8 app in the store right now and it's been certified for Windows 8 and Windows RT devices. Also, in my Windows Store dashboard, no crashes are shown. For some reason, though, a commenter who reviewed my app says that it crashes on launch in Windows RT, and I have no way to test that (I don't have a Windows RT device).

To help diagnose the problem, I've decided to create a crash page which would launch if the app crashed the last time it opened. Is there a way to set some variables right before an app crashes? That way I could, say, create a variable "recoverymode" that would launch a page asking for more information the next time the app is launched. Or is there some way to do this for Windows 8 apps that I'm not aware of that will automatically send me crash data?