November 2001
Intermediate to advanced
512 pages
9h 10m
English
Content preview from Visual Basic Design Patterns: VB 6.0 and VB.NETBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 6. Inheritance and Interfaces
As you begin to work more with classes, you soon come across programming cases where you have classes that are similar to others you are already using in this program or another one. It seems a shame to just copy all that code over again and have a lot of objects that are separate but very alike.
In languages like Java and VB.NET, you can derive new classes from existing classes and change only those methods that differ in the new class, with the unchanged parent methods called automatically. VB6 does not support this level of inheritance, but it does provide interfaces and implementations that allow you to produce related classes with only a small amount of effort.
Interfaces
In VB, you can create a class containing ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.