Failing to call a function using GetProcAddress in my own dll

I have two projects, one is AddExec and the other is DllAdd.
AddExec loads DllAdd and calls the Add function after retrieving the address through GetProcAddress..

Here’s my main.cpp for AddExec

#include <iostream>
#include <windows.h>
typedef int(__cdecl*AddPtrType) (int x, int y);
int main()
{
    HMODULE DllAddModule = LoadLibraryA("DllAdd.dll");
    if (DllAddModule == NULL)
    {
        DWORD error = GetLastError();
        std::cerr << "Failed to get address : " << error;
        return -1;
    }
        
    AddPtrType AddLocal = (AddPtrType)GetProcAddress(DllAddModule, "Add");
    if (AddLocal == NULL)
    {
        DWORD error = GetLastError();
        std::cerr << "Failed to get address : " << error;
        return -1;
    }
    int x = AddLocal(10, 15);
    std::cout << x;
    return 0;
}

And here’s my main.cpp for DllAdd.dll

__declspec(dllexport) int __cdecl Add(int x, int y)
{
    return x + y;
}

The function inside DllAdd is called Add. But when I attempt to retrieve its address I get error code 127

ERROR_PROC_NOT_FOUND
127 (0x7F)
The specified procedure could not be found.

I don’t know why it can’t find the address.. I Am exporting it and using the exact function names

>Solution :

Your compiler is manging the name of your Add function in DllAdd. Because you’re compiling it with the a C++ compiler which allows for function name overloading. The way to resolve this is as I mentioned either compile it as a C project or prevent your compiler from renaming or name mangling the function like so.

extern "C" __declspec(dllexport) int __cdecl Add(int x, int y)
{
    return x + y;
}

extern "C" will prevent your compiler from altering it.