protected void Page_Load(object sender, System.EventArgs e)
{
   FpSpread1.Sheets[0].Cells[1, 1].Text = "aaatest";
}
protected void Button1_Click(object sender, EventArgs e)
{
    //TextContains CF
    FarPoint.Web.Spread.TextConditionalFormattingRule text = new FarPoint.Web.Spread.TextConditionalFormattingRule(FarPoint.Web.Spread.TextConditionOperator.BeginsWith, "aaa");
    text.Operator = FarPoint.Web.Spread.TextConditionOperator.BeginsWith;
    text.BackColor = Color.Red;
    FpSpread1.ActiveSheetView.SetConditionalFormatting(1, 1, text);
}
	 
	
		Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    FpSpread1.Sheets(0).Cells(1, 1).Text = "aaatest"
End Sub
Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    'TextContains CF
    Dim text As New FarPoint.Web.Spread.TextConditionalFormattingRule(FarPoint.Web.Spread.TextConditionOperator.BeginsWith, "aaa")
    text.Operator = FarPoint.Web.Spread.TextConditionOperator.BeginsWith
    text.BackColor = Drawing.Color.Red
    FpSpread1.ActiveSheetView.SetConditionalFormatting(1, 1, text)
End Sub