iOS Question How to remove top screen

Private Sub Application_Start (Nav As NavigationController)

NavControl = Nav
    Page1.Initialize("Page1")
    Page1.Title = "Page 1"
    Page1.RootPanel.Color = Colors.White
    NavControl.ShowPage(Page1)
    


'This part here...
NavControl.NavigationBarVisible = False
Dim no As NativeObject = App
    no.RunMethod("setStatusBarHidden:animated:", Array(True, False))