GrapeCity.Win.Spread.InputMan.CellType.Fields.NumberDecimalPartDisplayFieldInfo ndp = new GrapeCity.Win.Spread.InputMan.CellType.Fields.NumberDecimalPartDisplayFieldInfo();
ndp.MaxDigits = 3;
ndp.BackColor = Color.Orange; //PaintByControl must be true for appearance properties
GrapeCity.Win.Spread.InputMan.CellType.Fields.NumberDecimalSeparatorDisplayFieldInfo ndecimal = new GrapeCity.Win.Spread.InputMan.CellType.Fields.NumberDecimalSeparatorDisplayFieldInfo();
ndecimal.DecimalSeparator = Convert.ToChar("A");
GrapeCity.Win.Spread.InputMan.CellType.Fields.NumberIntegerPartDisplayFieldInfo npart = new GrapeCity.Win.Spread.InputMan.CellType.Fields.NumberIntegerPartDisplayFieldInfo();
npart.MinDigits = 3;
npart.BackColor = Color.Bisque;
GrapeCity.Win.Spread.InputMan.CellType.GcNumberCellType ncell1 = new GrapeCity.Win.Spread.InputMan.CellType.GcNumberCellType();
ncell1.DropDownCalculator.FlatStyle = FlatStyle.Popup;
ncell1.DropDownCalculator.Font = new System.Drawing.Font("Comic Sans MS", 10);
ncell1.PaintByControl = true;
ncell1.DisplayFields.Add(ndp);
ncell1.DisplayFields.Add(ndecimal);
ncell1.DisplayFields.Add(npart);
fpSpread1.Sheets[0].Cells[1, 1].CellType = ncell1;
fpSpread1.ActiveSheet.Cells[1, 1].Value = 12.3189;