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By Zarko Gajic, About.com Guide to Delphi Programming since 1998

Programmer Defined Classes and Objects - Delphi OOP Course Chapter 7

Thursday December 20, 2007
OOP Course :: One way to make a computer program more robust and more amenable to change is to build it in layers. One might have a user interface layer that takes care of the interaction between the user and the program, an application layer that implements the operations required by the application, and a persistence layer that takes care of permanent storage of the data. Find out about the "Three Layer" model by defining and instantiating your own classes to provide application logic.

Read the full article to learn how to Derive a New Class From an Existing One

Note: this chapter includes downloadable PDF including the Part 3 text, Full Code and Solutions to homework problems.

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