How to write a program in c++ using dll?

Question

C++ / C#

Explain to me, or help me write a program,
so that it would not be one exe file, but what else would be next to the executing exe file, dll files.

Answer 1

I haven’t written in C++ for 10 years, so I won’t tell you with code examples, but the principle hasn’t changed.
You create a DLL in which you describe the functionality and export the necessary functions. Then, in the exe, you include this library, import the functions and work with them.

Answer 2

https://msdn.microsoft.com/en-us/library/ms235636.aspx

Answer 3

A simple example without any boosts and other things that you do not need
microsin.net/programming/pc/dll-building-and-using.html
and here is
life-prog.ru/view_zam.php?cat=2&id=189
and google - c++ dll example visual studio
or your own ide