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  由于Visual Basic应用程序是基于对象的，所以应用程序的代码结构就是该程序在屏幕上物理表示的模型。根据定义，对象包含数据和代码。在屏幕上看到的窗体代表属性，这些属性定义了窗体的外观和内在特性。 本设计主要是运用Data控件。 (Applications because of Visual Basic are object-based, so the structure of application code is the program that the screen on the model physics. By definition, the object contains data and code. On the screen to see the form on behalf of the property, which defines the form of property appearance and internal characteristics. Designed mainly to use the Data control.)