private void TrackingMonitor_Click(object sender, RoutedEventArgs e) { int ret = 0; try { ret = ETDevice.iV_ShowTrackingMonitor(); if (ret == 1) { logger4.Text = "iV_ShowTrackingMonitor: successfully"; } if (ret != 1) { logger4.Text = "iV_ShowTrackingMonitor failed: " + ret; } } catch (System.Exception exc) { logger4.Text = "iV_ShowTrackingMonitor Exception: " + exc.Message; } }