iOS Question BarButtons and "Exit" application by setting it to background

[hatzisn]

Good morning everyone, I am using this code to add and handle a BarButton

Sub AddOwnBackButton
    Page1.HideBackButton = True
    backbut.InitializeText("< Back",  "GoBack")
    Page1.TopLeftButtons= Array(backbut)
End Sub


Sub Page1_BarButtonClick (Tag As String)
    
    If Tag = "GoBack" Then
        If bShowingStartPurchase = True Then
            ReloadOriginalLayout
            bShowingStartPurchase = False
        Else
            If KeyboardHeight > 0 Then
                Page1.ResignFocus
            Else
                NavControl.RemoveCurrentPage
            End If
        End If
    End If

End Sub

The intention is if it has not started the Purchase feature, to hide the keyboard if it is visible and if it is not to set the application in background.

The latter does not work. I cannot "exit" then application by setting it to background. How is this done? The code is in main.

 

[Erel]

An iOS app is not allowed to close itself or to move to the background.