Specifies the source of the values in a ComboBox or ListBox control.
指定组合框或列表框控件中数据值的源。
Specifies the index of the item most recently added to a ComboBox or ListBox control.
指定最近添加到组合框或列表框控件中的数据项的索引值。
The third parameter is necessary because some properties, such as the Items property of the listbox control, are indexed.
第三个参数是必需的,因为有些属性(例如Listbox控件的items属性)是索引的。
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