fpSpread1.ActiveSheet.Iteration = true;
fpSpread1.ActiveSheet.SetValue(0, 1, 20);
fpSpread1.ActiveSheet.MaximumChange = 5;
fpSpread1.ActiveSheet.MaximumIterations = 5;
fpSpread1.ActiveSheet.SetFormula(0, 2, "A1*3");
fpSpread1.ActiveSheet.SetFormula(0, 0, "B1+C1");
FpSpread1.ActiveSheet.Iteration = True
FpSpread1.ActiveSheet.SetValue(0, 1, 20)
FpSpread1.ActiveSheet.MaximumChange = 5
FpSpread1.ActiveSheet.MaximumIterations = 5
FpSpread1.ActiveSheet.SetFormula(0, 0, "B1+C1")
FpSpread1.ActiveSheet.SetFormula(0, 2, "A1*3")