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   ► KBTo/From GuidesVB ClassicCommands  Print This     

Class..Object (Cross Ref > Commands)

By Mike Prestwood

VB Classic versus C++/CLI: A side by side comparison between VB Classic and C++/CLI.

 
OOP Basics
 

Some languages support object-based concepts such as Paradox, Access, and VB Classic. Other languages have OO extensions and fully support object orientation in a hybrid fashion (such as C++ and Dephi for Win32). Finally, some lanages such as C#, VB.Net, Prism, and Java are entirely written in OO. Meaning, every line of code written must occur within a class).

Class..Object

[Other Languages] 

Languages Focus

In short, a class is a data type, and an object is an instance of a class type. A class has methods (routines), properties (member variables), and a constructor. The current values of the properties is the current state of the object. The UML is one of the diagraming disciplines that allows you to document the various changing states of a series of objects.

VB Classic:   Yes

One class per file. File must use a .cls extension (instead of .bas). You can include your classes in your project (a traditional OOP approach) or compile them to a DLL or ActiveX EXE, register them, and use them that way (a uniquely VB approach).

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