Interface (ASP Classic and Delphi Prism Cross Reference Guide)

An element of coding where you define a common set of properties and methods for use with the design of two or more classes.

Both interfaces and abstract classes are types of abstraction. With interfaces, like abstract classes, you cannot provide any implementation. However, unlike abstract classes, interfaces are not based on inheritance. You can apply an Interface to any class in your class tree. In a real sense, interfaces are a technique for designing horizontally in a class hierarchy (as opposed to inheritance where you design vertically). Using interfaces in your class design allows your system to evolve without breaking existing code.

ASP Classic:  "Interfaces" Not Supported Although ASP Classic does support simple classes, it does not support interfaces.  ASP Classic Interfaces (Not Supported)

Delphi Prism:  "Interfaces" With Prism, you use the Interface keyword to define an interface and then you include one or more interfaces where you specify the single class inheritance (separated by commas). Syntax Example: //Interface section of unit. IHuman = public interface //Specify interface methods and properties here. end; TCyborg = public class end; TCyborgHuman = public class(TCyborg, IHuman) //Specify each here and implement in //implementation section. end;  Delphi Prism Interfaces