Android Question Not all code paths return a value

Sub activity_KeyPress (KeyCode As Int) As Boolean

If KeyCode = KeyCodes.KEYCODE_BACK Then
   
        Private ans As Int
        ans = Msgbox2("Do you want to close the app?", "Close App","Yes","Logout","No", Null)
           
        If ans = DialogResponse.POSITIVE Then
            Activity.Finish
        Else If ans = DialogResponse.CANCEL  Then
            Activity.LoadLayout("frmlogin")
        Else
   
        End If
   
        Return True
           
        Else 'Add this.
       
          Return False 'Add this.
 
    End If

End Sub

Sub activity_KeyPress (KeyCode As Int) As Boolean 'Returns a value.

Else
     Return False