How to set conditional formatting for numbers?

//Applying conditional formatting to "A3" for format type as CellValue( Equal)
            IConditionalFormats condition2 = sheet.Range["A3"].ConditionalFormats;
            //Adding formats to IConditionalFormats collection
            IConditionalFormat condition3 = condition2.AddCondition();
            sheet.Range["A3"].Text = "Enter the Number as 1000";
            //Setting format properties.
            condition3.FormatType = ExcelCFType.CellValue;
            condition3.Operator = ExcelComparisonOperator.Equal;
            condition3.FirstFormula = "1000";
            condition3.FontColorRGB = Color.FromArgb(0xde, 0x64, 0x13);

'Applying conditional formatting to "A3" for format type as CellValue( Equal)
        Dim condition2 As IConditionalFormats = sheet.Range("A3").ConditionalFormats
        'Adding formats to IConditionalFormats collection
        Dim condition3 As IConditionalFormat = condition2.AddCondition()
        sheet.Range("A3").Text = "Enter the Number as 1000"
        'Setting format properties.
        condition3.FormatType = ExcelCFType.CellValue
        condition3.Operator = ExcelComparisonOperator.Equal
        condition3.FirstFormula = "1000"
        condition3.FontColorRGB = Color.FromArgb(204, 212, 230)