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Object-Oriented Programming Sample 

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This solution demonstrates some of the object-oriented features of Visual Basic.

Security noteSecurity Note

This sample code is provided to illustrate a concept and should not be used in applications or Web sites, as it may not illustrate the safest coding practices. Microsoft assumes no liability for incidental or consequential damages should the sample code be used for purposes other than as intended.

To open the sample file in Solution Explorer

  1. Click Download Sample.

    The File Download message box appears.

  2. Click Open, and on the left column of the zip folder window, click Extract all files.

    The Extraction Wizard opens.

  3. Click Next. You can change the directory that the files will be extracted to, and then click Next again.

  4. Make sure that the Show extracted files check box is selected, and click Finish.

  5. Double-click the sample's .sln file.

    The sample solution is displayed in Solution Explorer. You might get a security warning that says the solution location is not trusted. Click OK to continue.

To run this sample

  • Press F5.


The project includes several class definitions. Customer is the base class, and contains only three properties. Four other classes are derived from the Customer class. Each inherits the properties of Customer, but adds another category of class member.

  • CustomerPropertySyntax is a modification of the Customer class that sets the AccountNumber property during construction. Once created, the AccountNumber cannot be changed.

  • CustomerWithConstructor is a modification of Customer that includes a constructor that sets all three properties during instantiation.

  • CustomerWithParameterizedProperty is a customization of Customer that adds a property that takes a parameter.

  • CustomerWithSharedMembers adds a shared property and a shared method to the Customer class.

See Also