Classes, Objects, and Interfaces

In the C++ programming language, a class consists of properties (or member data) and methods (or member functions). The properties are data elements, such as those contained in a structure. The methods are used for a variety of purposes, such as initialization, assignment, operations, and data access. You use a class declaration in the same way that you use a structure declaration. Memory is allocated for a class when you define a class object. Each class object has a data area for its properties and a table of pointers to the methods it supports.

In OLE, an object consists of data and methods, as it does in C++. However, an OLE object adheres to stricter rules. The data is strictly internal. An object only exposes interfaces. An interface is a set of related methods for an object. Each object can support multiple interfaces. All OLE interfaces support the IUnknown interface.

Software for developers
Delphi Components
.Net Components
Software for Android Developers
More information resources
Unix Manual Pages
Delphi Examples