The application is based on the MFC (Microsoft Foundation Classes) framework. I know that many people find MFC programming complex and quite outdated. But, since I don't bother writing software for other operating systems than Windows, I've kept this technology for all my programming projects. Since the Visual Studio compiler supports the latest ISO C++ 20 standard, STL is widely used as a replacement for classic C++ methods. In addition, Hungarian notation, introduced at Microsoft by Charles Simonyi, is systematically used to name program variables. Again, many programmers deny the use of this naming convention. But, once again, I don't worry about it. Charles Simonyi is one of the best software designers, and I have personally found Hungarian notation extremely useful in software development.