protected void Page_Load(object sender, System.EventArgs e)
                       {
                           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;    
                       }

protected void Button1_Click(object sender, EventArgs e)
        {
            //TopRank CF
            FarPoint.Web.Spread.TopRankedValuesConditionalFormattingRule topRank = new FarPoint.Web.Spread.TopRankedValuesConditionalFormattingRule();
            topRank.IsDescending = true;
            topRank.BackColor = Color.Tomato;
            FpSpread1.ActiveSheetView.SetConditionalFormatting(0, 0, 3, 3, topRank);
        }

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
            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
        End Sub

Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
            'TopRank CF
            Dim topRank As New FarPoint.Web.Spread.TopRankedValuesConditionalFormattingRule()
            topRank.IsDescending = True
            topRank.BackColor = Drawing.Color.Tomato
            FpSpread1.ActiveSheetView.SetConditionalFormatting(0, 0, 3, 3, topRank)
        End Sub