C#编写COM提供给C++调用示例

using System;
using System.Runtime.InteropServices;

namespace AddCom
{
    [Guid("8F5710FD-528A-4474-A673-47717F93EA88")]
    public interface AddComInterface
    {
        [DispId(1)]
        int Add(int a, int b);
    }

    [Guid("FFA2EB4B-1BBE-4332-8D3E-5E9F619A3FC9")]
    [ClassInterface(ClassInterfaceType.None)]
    public class AddComClass : AddComInterface
    {
        public int Add(int a, int b)
        {
            return a + b;
        }
    }
}

#include 
#include 
#import "../../AddCom/AddCom/bin/Debug/AddCom.tlb"

using namespace AddCom;

int main()
{
	CoInitialize(0);
    AddCom::AddComInterfacePtr pAddCom(__uuidof(AddComClass));
	int a = pAddCom->Add(1, 2);
	std::cout << a << std::endl;
	CoUninitialize();
	return 0;
}