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我有一个第三方 .NET dll,我想将它公开给原生 C++ dll,所以我用 C# 编写了一个包装 dll;但是在原生 C++ dll 中,每次执行到 CoCreateInstance() 时,都会返回这个 -858993460 错误;

----------------------下面是程序的结构-----------------

ThorDetectorSwitch.dll(本机 C++ dll)-> MCLWrapper.dll(COM C# dll)-> mcl_RF_Switch_Controller64.dll(第三方 .NET dll)

----------------------下面是我的一些代码---------- -

C# 包装器 dll(MCLWrapper.dll,COM 可调用包装器 dll):

// C# COM wrapper for mcl_RF_Switch_Controller64.dll 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using mcl_RF_Switch_Controller64;
using System.Runtime.InteropServices;
// for function reference see miniCircuit RF controller manual

namespace MCLWrapper
{
    [Guid("727C569D-09AF-472c-8032-2AC9BC7CDC30")]
    [InterfaceType(ComInterfaceType.InterfaceIsDual)]
    [ComVisible(true)]
    public interface MCLControl
    {
        [DispId(1)]
        void Connect(string SerialNumber);

        [DispId(2)]
        void Set_Switch(string SwitchName, int Val);

        [DispId(3)]
        void Set_SwitchesPort(byte binVal);

        [DispId(4)]
        void GetSwitchesStatus(int statusRet);

        [DispId(5)]
        void Disconnect();
    };

    [Guid("68A7F8A1-6347-4bb1-9809-EE18E1E9BDD6")]
    [ClassInterface(ClassInterfaceType.None)]
    [ProgId("MCLWrapper.MCLControlClass")]
    public class MCLControlClass : MCLControl
    {
        public USB_RF_SwitchBox _sb = new USB_RF_SwitchBox();

        //public MCLControlClass() { }    
        public void Connect(string SerialNumber)
        {
            _sb.Connect(ref SerialNumber);
        }

        public void Set_Switch(string SwitchName, int Val)
        {
            _sb.Set_Switch(ref SwitchName, ref Val);
        }

        public void Set_SwitchesPort(byte binVal)
        {
            _sb.Set_SwitchesPort(ref binVal);
        }

        public void GetSwitchesStatus(int statusRet)
        {
            _sb.GetSwitchesStatus(ref statusRet);
        }

        public void Disconnect()
        {
            _sb.Disconnect();
        }
    }
}

ThorDetctorSwitch.dll(调用 CCW MCLWrapper.dll 的本机 C++)的构造函数:

#import "../MCLWrapper/MCLWrapper/bin/Debug/MCLWrapper.tlb" raw_interfaces_only

using namespace MCLWrapper;

MCLWrapper::MCLControl *_mcSwitch;

ThorDetectorSwitch::ThorDetectorSwitch()
{
    HRESULT hr = CoInitialize(NULL);
    MCLWrapper::MCLControlPtr mclSmartPtr;
    hr = ::CoCreateInstance(__uuidof(MCLWrapper::MCLControlClass), NULL,CLSCTX_ALL, __uuidof(MCLWrapper::MCLControl), (void**)&mclSmartPtr    );
    _mcSwitch = mclSmartPtr;

    _A  = WstringToBSTR(L"A"); 
    _B  = WstringToBSTR(L"B");
    _C  = WstringToBSTR(L"C");
    _D  = WstringToBSTR(L"D");

    _deviceDetected = FALSE;
}

我用来注册 MCLWrapper.dll 的命令行

regasm MCLWrapper.dll /tlb:MCLWrapper.tlb /codebase

并成功返回注册表。

错误:错误发生在

hr = ::CoCreateInstance(__uuidof(MCLWrapper::MCLControlClass), NULL,CLSCTX_ALL, __uuidof(MCLWrapper::MCLControl), (void**)&mclSmartPtr    );

我不认为这条线是完全执行的。

有人有什么想法吗?非常感谢。

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