'宣言
Public MustInherit Class _ItemizedLegendDataModel Inherits _SingleLegendDataModel Implements IItemizedLegendDataModel, ILegendDataModel, IQueryInterface, ISingleLegendDataModel
public abstract class _ItemizedLegendDataModel : _SingleLegendDataModel, IItemizedLegendDataModel, ILegendDataModel, IQueryInterface, ISingleLegendDataModel