FarPoint.CalcEngine.Expression one;
FarPoint.CalcEngine.Expression two;
FarPoint.CalcEngine.Expression oneplustwo;
one = new FarPoint.CalcEngine.DoubleExpression(100.0);
two = new FarPoint.CalcEngine.DoubleExpression(20.0);
oneplustwo = new FarPoint.CalcEngine.BinaryOperatorExpression(FarPoint.CalcEngine.BinaryOperatorInfo.AddOperator, one, two);
FpSpread1.ActiveSheetView.SetExpression(0, 0, oneplustwo);
FarPoint.CalcEngine.Expression x;
x = FpSpread1.ActiveSheetView.GetExpression(0, 0);
string msg = x.ToString();
Response.Write("alert('" + msg + "')");