When the App starts it calls OnLaunched() in App.xaml.cs:


       protected override async void OnLaunched(LaunchActivatedEventArgs e)

       {

           VenturaApplication.OnLaunched(typeof(MainPage), e);

       }


The first parameter in Ventura.OnLaunched() is the main page that will be created.


The main page should only contain a single control:


<Page>

   <Ventura:ShellFrame/>

</Page>


In the Loaded event you can put pages that should auto-open on startup:


       private void Page_Loaded(object sender, RoutedEventArgs e)

       {

           Navigator.AddTab("Start Page", "Start Page", new StartPage(), "STARTPAGE");

       }