private void TracboxViewer(object sender, RoutedEventArgs e) { tracboxViewer = new TracboxViewer(); trackerController.tracker.GazeData += tracboxViewer.EyeTrackerGazeData; trackerController.tracker.EyeTrackerError += tracboxViewer.EyeTrackerError; tracboxViewer.Closed += tracboxViewer_Closed; tracboxViewer.Start(); }