this.gridGroupingControl1.TableDescriptor.Columns[1].Appearance.AnyRecordFieldCell.CellType = "CheckBox";
GridTableCellStyleInfo style = this.gridGroupingControl1.TableDescriptor.Columns["Col2"].Appearance.AnyRecordFieldCell;
style.CellType = "GridListControl";
style.DropDownStyle = GridDropDownStyle.Editable ;