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ADO.NET Programming in Visual Basic™ .NET by Bob Howell, Steve Holzner

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A Thumbnail Sketch of OOP

Until this version, VB was not object oriented in a strictly academic sense. While it is true that VB 6 uses objects and can create classes, they are not true classes in the OOP paradigm. They are really COM objects, and there’s an important difference. For a language to be truly object oriented, it must support the following capabilities:

  • Encapsulation— Data in a class must be able to be fully hidden from the rest of the program. The language must provide a mechanism for controlling this access. Moreover, the class must be self-sufficient, with no external dependencies other than its immediate parent.

  • Inheritance— Classes derived from other classes must have a mechanism for inheriting the functionality and data of ...

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