它还为组件的已更改事件和正在更改的事件定义了方法，当组件正在更改或已经更改时(例如，当属性更改时)，这些方法由设计时环境调用。

It also defines methods for component changed and changing events, which are called by the design-time environment when a component is changing or has changed (such as when a property is changed).

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表2 - 7列出了当您控制电子表格组件的撤消机制时会用到的有关的属性和方法。

Table 2-7 lists the relevant properties and methods you will use when controlling the Undo mechanism of the Spreadsheet component.

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表2 - 5列出了在电子表格组件中排序和过滤数据时可以使用的属性和方法。

Table 2-5 lists the properties and methods you will use when sorting and filtering data in the Spreadsheet component.

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