I have a shared library project using c++20 solution(there are a module named MyDll in it).And I use import to use some std modules such as string and vector.

When I try to use this shared library in another project in the solution(I will call it Application),I use import MyDll and successfully imported the module.However the compiler reported “can’t find headerUnit e:compilervisual studio 2022communityvctoolsmsvc14.40.33807includestring”

But I can find this headerUnit in the expolorer.And I notice that the compiler converted all uppercase letters in the path to lowercase letters.I wonder if it’s causing the error.

I use Visual Studio 2022.

But if I import the std modules used in the shared library, there’re no error again.

import <iostream>;
//--modules I use in the shared library--
import <string>;
import <string_view>;
import <vector>;
//-------------------

import MyDll;

int main()
{
    ...
    return 0;
}

but I don’t want to import every std module used in the shared library.