如何通过COM接口将64位整数从C++发送到C#

// MyInterface.h
#pragma once

#include <Windows.h>

// 定义COM接口
interface __declspec(uuid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")) IMyInterface : public IUnknown
{
public:
    virtual HRESULT __stdcall SendInt64(__int64 value) = 0;
};

// MyInterface.cpp
#include "MyInterface.h"

class CMyInterface : public IMyInterface
{
public:
    // 实现发送64位整数的方法
    HRESULT __stdcall SendInt64(__int64 value)
    {
        // 将整数发送到C#
        // ...
        return S_OK;
    }

    // 实现其他接口方法
    // ...
};

// 注册COM组件
BOOL RegisterCOMComponent()
{
    HRESULT hr = CoInitialize(NULL);
    if (FAILED(hr))
        return FALSE;

    CMyInterface* pMyInterface = new CMyInterface();
    hr = CoRegisterClassObject(__uuidof(IMyInterface), pMyInterface, CLSCTX_LOCAL_SERVER, REGCLS_SINGLEUSE, NULL);
    if (FAILED(hr))
    {
        delete pMyInterface;
        CoUninitialize();
        return FALSE;
    }

    CoUninitialize();
    return TRUE;
}

using System;
using System.Runtime.InteropServices;

class Program
{
    // 引用COM接口
    [ComImport]
    [Guid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    interface IMyInterface
    {
        void SendInt64(long value);
    }

    static void Main(string[] args)
    {
        // 创建COM接口实例
        IMyInterface myInterface = (IMyInterface)Activator.CreateInstance(Type.GetTypeFromCLSID(new Guid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")));

        // 发送64位整数
        long value = 1234567890123456789;
        myInterface.SendInt64(value);
    }
}