private void ChartControl_MouseMove(object sender, MouseEventArgs e)
    {
    NHitTestResult res = null;

    try
    {
      res = HitTest(e.X, e.Y);
    }
    catch (Exception)
    {

    }

    if (null != res)
    {
      if (res.ChartElement == ChartElement.LegendDataItem)
      {
        for (int i = 0; i < Charts.Count; i++)
        {
        foreach (NSeriesBase s in Charts[i].Series)
        {
          NSeriesLegend seriesLegend = s.Legend;
          seriesLegend.TextStyle.FontStyle.Style = FontStyle.Regular;
        }
        }

        res.LegendDataItem.TextStyle.FontStyle.Style = FontStyle.Underline;

        res.LegendDataItem.InteractivityStyle.Cursor.Type = CursorType.Hand;

        resetLegend = true;

        Refresh();
      }
      else
      {
        if (resetLegend)
        {
        for (int i = 0; i < Charts.Count; i++)
        {
          foreach (NSeriesBase s in Charts[i].Series)
          {
            NSeriesLegend seriesLegend = s.Legend;
            seriesLegend.TextStyle.FontStyle.Style = FontStyle.Regular;
          }
        }

        Refresh();
        resetLegend = false;
        }
      }
    }
    }