Calling Go from C++

ConsoleApplication.cpp

// ConsoleApplication1.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <windows.h>
#include <iostream>

//typedef char* (__stdcall* f_funci)();
typedef char* (__stdcall* f_PrintZio)(char*);

int main()
{
    std::cout << "Hello World!\n";


    HINSTANCE hGetProcIDDLL = LoadLibrary(L"C:\\Users\\zione\\Desktop\\shared\\midly.dll");

    if (!hGetProcIDDLL) {
        std::cout << "could not load the dynamic library" << std::endl;
        return EXIT_FAILURE;
    }

    // resolve function address here
    //f_funci funci = (f_funci)GetProcAddress(hGetProcIDDLL, "PrintSetteSette");
    //f_funci funci = (f_funci)GetProcAddress(hGetProcIDDLL, "PrintStr");
    f_PrintZio funci = (f_PrintZio)GetProcAddress(hGetProcIDDLL, "PrintZio");
    
    if (!funci) {
        std::cout << "could not locate the function" << std::endl;
        return EXIT_FAILURE;
    }

    std::cout << "funci() returned " << funci((char*)"All the small things, true care, true thingsa") << std::endl;


    std::cout << "Zio!!\n";
}

main.go

package main

import "C"
import "fmt"

//export PrintSetteSette
func PrintSetteSette() int {    
    return 77
}

//export PrintStr
func PrintStr() *C.char{
    return C.CString(fmt.Sprintf("From DLL: Hello, %s!\n", 8))
}


//export PrintZio
func PrintZio(Input *C.char) *C.char{
    return C.CString(fmt.Sprintf("From DLL: zio, %s", C.GoString(Input)))
}


func main() {
    // Need a main function to make CGO compile package as C shared library
}

// build with go build -buildmode=c-shared -o midly.dll