Hello friends, I made this app just to try it out and have some fun, haha, but the comments are right, something like this could have been done more sensibly with C++ or other languages, ahaha.
I am not sure why but I believe writing C style code with a C++ compiler was how the windows API was documented to be used. I think Microsoft just went with the idea that C++ was an improved superset of C so should be used even for C-style code.
And as a consequence, for a long time their official C compiler was stuck on C89, while other platforms already had full C99 support and beyond. I believe their support for newer C standards has gotten better since then, but AFAIK they still don't have full C99 support.
Other language doesn't fundamentally change anything if you want to use win32 API, if anything it would make things more confusing.
People often fall prey to C++isms, and they would have made the whole thing an even more confusing mess (to people not familiar with win32 API).
This is a very cute thing to do and some familiarity with win32 APIs is a nice basic competency thing, regardless of what other people think.
WTL (https://en.wikipedia.org/wiki/Windows_Template_Library) is the oldschool way to do low-level Win32 coding in C++.