GrapeCity.Win.Spread.InputMan.CellType.GcNumberCellType ncell = new GrapeCity.Win.Spread.InputMan.CellType.GcNumberCellType();
ncell.AllowDeleteToNull = false;
fpSpread1.Sheets[0].Cells[0, 0].CellType = ncell;
Dim ncell As New GrapeCity.Win.Spread.InputMan.CellType.GcNumberCellType()
ncell.AllowDeleteToNull = False
fpSpread1.Sheets(0).Cells(0, 0).CellType = ncell