FarPoint.Web.Chart.HighLowAreaSeries hseries = new FarPoint.Web.Chart.HighLowAreaSeries();
hseries.HighValues.AddRange(new double[] { 5, 7, 6, 8, 7, 9 });
hseries.LowValues.AddRange(new double[] { 2, 4, 3, 5, 4, 6});
YPlotArea plotArea = new YPlotArea();
plotArea.Location = new PointF(0.2f, 0.2f);
plotArea.Size = new SizeF(0.6f, 0.6f);
plotArea.Series.Add(hseries);
ChartModel model = new ChartModel();
model.PlotAreas.Add(plotArea);
FarPoint.Web.Spread.Chart.SpreadChart chart = new FarPoint.Web.Spread.Chart.SpreadChart();
chart.Model = model;
FpSpread1.Sheets[0].Charts.Add(chart);

Dim hseries As New FarPoint.Web.Chart.HighLowAreaSeries()
hseries.HighValues.AddRange(New Double() {5, 7, 6, 8, 7, 9})
hseries.LowValues.AddRange(New Double() {2, 4, 3, 5, 4, 6})

Dim plotArea As New FarPoint.Web.Chart.YPlotArea()
plotArea.Location = New System.Drawing.PointF(0.2F, 0.2F)
plotArea.Size = New System.Drawing.SizeF(0.6F, 0.6F)
plotArea.Series.Add(hseries)

Dim model As New FarPoint.Web.Chart.ChartModel()
model.PlotAreas.Add(plotArea)
Dim chart As New FarPoint.Web.Spread.Chart.SpreadChart()
chart.Model = model
FpSpread1.Sheets(0).Charts.Add(chart)