Steema Central

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//Initiliaze charts
 protected override void InitializeCharts()
{
      // Add following lines
      fastLine.AfterDrawValues += lineSeries_AfterDrawValues;
      fastLine.BeforeDrawValues += lineSeries_BeforeDrawValues;
	  //Add another fastline's event handler
	  ...
	  tChart.Zoom.Direction = ZoomDirections.Vertical;
}
 private void lineSeries_BeforeDrawValues(object sender, Steema.TeeChart.Drawing.Graphics3D g)
    {
       if (g.Chart.Zoom.Zoomed)
       {
          FastLine s = sender as FastLine;
          int left = s.GetHorizAxis.IStartPos;
          int right = s.GetHorizAxis.IEndPos;
          int top = s.GetVertAxis.IStartPos;
          int bottom = s.GetVertAxis.IEndPos;
          g.ClipRectangle(left, top, right, bottom);
       }
    }
    private void lineSeries_AfterDrawValues(object sender, Steema.TeeChart.Drawing.Graphics3D g)
    {
       g.ClearClipRegions();
    }