The article describes an experiment in building a game for Windows 1.0 using the original WinAPI and development tools from the mid-1980s. By recreating software with the first Windows programming interface, the author shows that many core concepts of Windows development—message loops, event handling, windows, and graphical APIs—were already present in the earliest release and have remained remarkably stable for four decades. The main point is that the longevity of the WinAPI demonstrates an unusual level of backward compatibility, allowing software concepts introduced in 1985 to remain recognizable and relevant in modern Windows development.
https://medium.com/@stassaf.uae/windows-1-0-and-the-winapi-40-years-later-abaf64832918