Hello @Mr.Zak ,
Thank you for taking time to post this issue in Microsoft Q&A forum.
The steps for creating your own library and function for C++ in VS Code may be different from the steps for creating them in VS.
Since VS Code is currently not supported in the Microsoft Q&A forums, you can kindly post this question on Stack Overflow for better assistance.
Thanks for your understanding, have a nice day.
Sincerely,
Tianyu
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