so I started to wonder what are all these libraries that I can include to preprocessor (in VStudio getting huuuuge list of header files when '#include<' is typed).
I mean, obviously they have functions inside of them and I can use them but how I can find these functions and in general information about them every library/header file (not sure which one is correct).
in bigger project, you might require a lot more function from different libs.
To find these functions, you might want to read to documentation more, or just simply Google the thing you need.