FarPoint.Win.Spread.CellType.PercentCellType prctcell = new FarPoint.Win.Spread.CellType.PercentCellType();
prctcell.DecimalPlaces = 3;
prctcell.DecimalSeparator = ",";
prctcell.FixedPoint = true;
prctcell.LeadingZero = FarPoint.Win.Spread.CellType.LeadingZero.UseRegional;
prctcell.MaximumValue = 50000.0;
prctcell.MinimumValue = -1000.0;
prctcell.NegativeFormat = FarPoint.Win.Spread.CellType.PercentNegativeFormat.PercentAfterWithSpace;
prctcell.NegativeRed = true;
prctcell.PercentSign = "%";
prctcell.PositiveFormat = FarPoint.Win.Spread.CellType.PercentPositiveFormat.PercentAfter;
prctcell.Separator = "/";
prctcell.ShowSeparator = true;
prctcell.SpinButton = true;
prctcell.SpinDecimalIncrement = 10;
prctcell.SpinIntegerIncrement = 5;
prctcell.SpinWrap = true;
fpSpread1.ActiveSheet.Cells[0, 0].CellType = prctcell;
fpSpread1.ActiveSheet.Cells[0, 0].Value = -443.0908;