'宣言
Public Class DateTimeCellType Inherits FieldsEditorBaseCellType Implements GrapeCity.Windows.SpreadGrid.Editors.IAllowDropDownCellType, GrapeCity.Windows.SpreadGrid.Editors.IAllowSpinCellType
public class DateTimeCellType : FieldsEditorBaseCellType, GrapeCity.Windows.SpreadGrid.Editors.IAllowDropDownCellType, GrapeCity.Windows.SpreadGrid.Editors.IAllowSpinCellType