Cell Value Rule

var style = new GC.Spread.Sheets.Style();
style.backColor = "red";
var rule = new GC.Spread.Sheets.ConditionalFormatting.NormalConditionRule();
rule.ruleType(GC.Spread.Sheets.ConditionalFormatting.RuleType.CellValueRule);
rule.ranges([new GC.Spread.Sheets.Range(0,0,5,1)]);
rule.operator(GC.Spread.Sheets.ConditionalFormatting.ComparisonOperators.Between);
rule.style(style);
rule.value1(2);
rule.value2(100);
activeSheet.conditionalFormats.addRule(rule);
activeSheet.setValue(0,0,1,3);
activeSheet.setValue(1,0,45,3);
// OR
var style = new GC.Spread.Sheets.Style();
style.backColor = "red";
var ranges=[new GC.Spread.Sheets.Range(0,0,5,1)];
activeSheet.conditionalFormats.addCellValueRule(GC.Spread.Sheets.ConditionalFormatting.ComparisonOperators.Between, 2, 100, style, ranges);
activeSheet.setValue(0,0,1,3);
activeSheet.setValue(1,0,45,3);