public RadForm1()
        {
            InitializeComponent();
            this.radGridView1.ScreenTipNeeded += radGridView1_ScreenTipNeeded;
        }
        
        RadOffice2007ScreenTipElement screenTip = new RadOffice2007ScreenTipElement();

        private void radGridView1_ScreenTipNeeded(object sender, ScreenTipNeededEventArgs e)
        {
            GridDataCellElement cell = e.Item as GridDataCellElement;
            e.Delay = 1;
           
            if (cell != null && cell.ColumnIndex == 1)
            {
                this.radLabelElement1.Text = cell.Text;  // StatusBar
                screenTip.CaptionVisible = false;
                screenTip.MainTextLabel.Text = cell.Text.ToString();
                cell.ScreenTip = screenTip;
            }
        }