Export function from a C++ DLL using DEF file

This video shows how to create a C++ DLL with functions that are exported.
There are two ways of exporting methods from a C++ library:
1. Using the keyword __declspec
2. Using the DEF file.

Also, this video shows how to find the exports present in a C++ DLL using the DumpBin command.

[nemowhere]

i want to see the what is context in the mylib.cpp, pls 😄

[trueindian]

I need to export dll classes through c#. Kindly make video on that.

[huyvole]

When I create C++ DLL project, result of build is *.dll *.lib, C++ console add *.dll *.lib and include *.h.
When I create C++ Static lib project, result of build is *.lib, C++ console add *.lib and include *.h.
Your *.def use for what? I don't understand

[ReckyXXX]

Thanks! Please, remove noise from audio next time..