FarPoint.Win.Spread.CellType.PercentCellType prct = new FarPoint.Win.Spread.CellType.PercentCellType();
prct.NegativeFormat = FarPoint.Win.Spread.CellType.PercentNegativeFormat.PercentAfterWithSpace;
fpSpread1.ActiveSheet.Cells[0, 0].CellType = prct;
fpSpread1.ActiveSheet.Cells[0, 0].Value = -0.34;
Dim prct As New FarPoint.Win.Spread.CellType.PercentCellType()
prct.NegativeFormat = FarPoint.Win.Spread.CellType.PercentNegativeFormat.PercentAfterWithSpace
fpSpread1.ActiveSheet.Cells(0, 0).CellType = prct
fpSpread1.ActiveSheet.Cells(0, 0).Value =- 0.34