What is software component? How to build component? What is component-oriented programming, and how? Since the development of computer, scientists, computer experts, have been trying to find a better way to build software applications. Numerous programming languages were developed, and the newer one has more power, capabilities to facilitate programming. Along with the newer, object-oriented capability languages such as C++, Java, C#, programming paradigm is also changed, from the structured to object-oriented, and to component-oriented programming.