Creating Xbox game, unwanted cursor during runtime

Hi, I'm relatively new to unity all together, just reaching around 4 to 5 months with it, but I have a demo ready and I'm trying to disable the mouse that is in the uwp game all-together. I've looked it up, and it tells me that I need to use this piece of code for the constructor to my app:

public App() {
this.InitializeComponent();
this.RequiresPointerMode = Windows.UI.Xaml.ApplicationRequiresPointerMode.WhenRequested;
this.Suspending += OnSuspending;
}

But I don't know where the author was meaning for me to put it. Am I supposed to put this into the app.xaml after the game is built on the visual studios file or do I input it into the game before the build?

where's the constructor I'm looking for?

 

Thanks for the reply, for some reason I didn't think the D3D was what I was looking for but it was, thanks again!