text: public override  ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1,ValueEval arg2){AreaEval aeRange;AreaEval aeSum;try{aeRange = ConvertRangeArg(arg0);aeSum = CreateSumRange(arg2, aeRange);}catch (EvaluationException e){return e.GetErrorEval();}return Eval(srcRowIndex, srcColumnIndex, arg1, aeRange, aeSum);}