FpSpread1.Sheets[0].Cells[0, 0].Value = 3;
FpSpread1.Sheets[0].Cells[1, 0].Value = 2;
FpSpread1.Sheets[0].Cells[1, 1].Value = 10;
FpSpread1.Sheets[0].Cells[0, 2].Value = 1;
FarPoint.Web.Spread.TwoColorScaleConditionalFormattingRule two = new FarPoint.Web.Spread.TwoColorScaleConditionalFormattingRule();
two.MaxValue = new FarPoint.Web.Spread.ConditionalFormattingColorValue(Color.Red, 10, FarPoint.Web.Spread.ConditionalFormattingValueType.Max);
two.MinValue = new FarPoint.Web.Spread.ConditionalFormattingColorValue(Color.Blue, 1, FarPoint.Web.Spread.ConditionalFormattingValueType.Min);
FpSpread1.ActiveSheetView.SetConditionalFormatting(0, 0, 3, 3, two);