'宣言
Public Class _CustomItemizedValuePointLegendItem Inherits _ItemizedPointLegendItemDataModel Implements IColorLegendItem, IItemizedLegendItemDataModel, IItemizedPointLegendItemDataModel, IQueryInterface, IStyleLegendItem
public class _CustomItemizedValuePointLegendItem : _ItemizedPointLegendItemDataModel, IColorLegendItem, IItemizedLegendItemDataModel, IItemizedPointLegendItemDataModel, IQueryInterface, IStyleLegendItem