private void showHelp()
 {
     var helpScreen = new HelpScreen();
     kinectRegionGrid.Children.Add(helpScreen);
     Grid.SetColumn(helpScreen, 0);
     Grid.SetColumnSpan(helpScreen, 4);
 }
        private void helpImage_MouseEnter(object sender, System.Windows.Input.MouseEventArgs e)
        {
            if (isHelpBeingShown) return;
            // display help
            var selectionDisplay = new HelpScreen(this);
            kinectRegionGrid.Children.Add(selectionDisplay);
            Grid.SetColumn(selectionDisplay, 0);

            isHelpBeingShown = true;
        }