Visual Studio 2019 won't to create .lib file in .dll project

Question

Hi all,

I'm learning to create .dll files. I started from the following page: https://learn.microsoft.com/en-us/cpp/build/walkthrough-creating-and-using-a-dynamic-link-library-cpp?view=msvc-170. I was able to configure Visual Studio correctly and I successfully created MathLibrary.dll file.

However, when i compile MathLibrary project, the .lib file isn't create. My code is exactly the same in the page. I have searched online for a solution, but I have not found one that works.

Can someone help me?

Thank you,

Answer 1

Hi all,

thank you for your help but i found a solution by myself. I explain for future leaners. I made three mistake:

1. I change the header and cpp files name to "MathLibrary-William" whithout changing these very first lines of code:

#ifdef MATHLIBRARY_EXPORTS
#define MATHLIBRARY_API __declspec(dllexport)
#else
#define MATHLIBRARY_API __declspec(dllimport)
#endif

      So the precompiler didn't find 

__declspec(dllexport)

     directive and couldn't generate .lib file;

1. When i created "MathLibrary-William.h" and "MathLibrary-William.cpp" files, I didn't add it in my project correct. We must click to File->Move to->"Project name";
2. #define directive can't have a - in their name.

I hope these errors can help someone.