101 Microsoft® Visual Basic® .NET Applications

Application #8. Scoping, Overloading, Overriding

Not every member of every class needs to be publicly available to applications using that class. Some procedures, properties, and other members should be for the private use of the class itself, while others might be made available to derived classes. This sample shows how to set various levels of access to the members of a class, including Public, Private, Protected, and others. It also demonstrates how to extend derived classes with features such as overloading and overriding.

The application simulates a simple hiring system that allows you to hire full-time, part-time, and temporary employees. It uses a series of classes to do its work. Employee is a base class containing the features common ...