DLLs in Visual C++
1.Introduce DLL
2.Create DLL
3.Export DLL
4.Use DLL
5.linking
https://docs.microsoft.com/en-us/cpp/windows/overview-of-windows-programming-in-cpp
https://docs.microsoft.com/en-us/cpp/windows/walkthrough-creating-and-using-a-static-library-cpp
https://docs.microsoft.com/en-us/cpp/build/building-on-the-command-line
https://docs.microsoft.com/en-us/cpp/build/walkthrough-creating-and-using-a-dynamic-link-library-cpp
https://docs.microsoft.com/en-us/cpp/build/exporting-cpp-functions-for-use-in-c-language-executables
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682589(v=vs.85).aspx
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682507(v=vs.85).aspx
https://msdn.microsoft.com/en-us/library/a90k134d.aspx
https://msdn.microsoft.com/en-us/library/d14wsce5.aspx
https://msdn.microsoft.com/en-us/library/3y1sfaz2.aspx
https://msdn.microsoft.com/en-us/library/0b9xe492.aspx
https://docs.microsoft.com/en-us/cpp/build/linking-an-executable-to-a-dll#determining-which-linking-method-to-use
http://www.lurklurk.org/linkers/linkers.html