Private Sub PPSGPS_FormClosing(sender As Object, e As FormClosingEventArgs) Handles MyBase.FormClosing
    Select Case e.CloseReason
      Case CloseReason.WindowsShutDown
        Logging.Log("Closing due to windows shutdown.", "PPSGPS_FormClosing")
        SaveCluster("STOP")
        return
      Case CloseReason.TaskManagerClosing
        Logging.Log("Closing due to task manager kill.", "PPSGPS_FormClosing")
        SaveCluster("STOP")
        return
    End Select