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► KB ► To/From Guides ► C++/CLI ► OOP Basics

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Cross Ref > OOP Basics

By Mike Prestwood

C++/CLI versus Access VBA: A side by side comparison between C++/CLI and Access VBA.

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).

Base Class

[Other Languages]

Languages Focus

When you create a class, it is either a base class or inherits from another class. Some languages require all classes to inherit from a common base class and some do not.

C++/CLI: System::Object

In C++/CLI, the Object keyword is an alias for the base System::Object class and is the single base class all classes ultimately inherit from.

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Access VBA: Not Supported

Member Method

[Other Languages]

Also known as a Class Method.

A code routine that belongs to the class or an object instance (an instance of the class). Methods that belong to the class are called class methods or static methods. Methods that belong to an object instance are called instance methods, or simply methods.

When a method returns a value, it is a function method. When no value is returned (or void), it is a procedure method.

Methods frequently use method parameters to transfer data. When one object instance calls another object instance using a method with parameters, you call that messaging.

[Not specified yet. Coming...]

Access VBA: Sub, Function

Access VBA uses the keywords sub and function. A sub does not return a value and a function does. Many programmers like to use the optional call keyword when calling a sub to indicate the call is to a procedure.

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