how to transfer c# com to c++ dll

vivs_basic.tlh

#pragma once
#pragma pack(push, 8)
#include <comdef.h>
namespace vivs_basicLib {
// Forward references and typedefs
struct __declspec(uuid("19de40dc-789d-4397-a772-144eeea5996a"))
/* dispinterface */ _IVivsBasicEvents;
struct /* coclass */ VivsBasic;
struct __declspec(uuid("4bd5f387-217f-4807-8ad9-5a765a891d5b"))
/* dual interface */ IVivsBasic;
// Smart pointer typedef declarations
_COM_SMARTPTR_TYPEDEF(_IVivsBasicEvents, __uuidof(IDispatch));
_COM_SMARTPTR_TYPEDEF(IVivsBasic, __uuidof(IVivsBasic));

// Type library items
struct __declspec(uuid("19de40dc-789d-4397-a772-144eeea5996a"))
_IVivsBasicEvents : IDispatch
{
    // Wrapper methods for error-handling
    
    // Methods:
    HRESULT VodTimeChangeEvent (
        long formHandle,
        long timeStamp,
        float speed );
};
struct __declspec(uuid("74de7b83-2a14-4679-bc61-e05bf275083f"))
VivsBasic;
    // [ default ] interface IVivsBasic
    // [ default, source ] dispinterface _IVivsBasicEvents
struct __declspec(uuid("4bd5f387-217f-4807-8ad9-5a765a891d5b"))
IVivsBasic : IDispatch
{
    // Wrapper methods for error-handling
    HRESULT Login (
        _bstr_t bstrServer,
        unsigned short usServerPort,
        _bstr_t bstrUserName,
        _bstr_t bstrPassword );
}

// VivsFunc.h
#import "vivs_basic.tlb"
using namespace vivs_basicLib;

class CVivsFunc
{
private:
	IVivsBasicPtr p_vivs; // 
	_IVivsBasicEventsPtr p_events;

	long VideoInitEvents();
public:
	CVivsFunc();
	virtual ~CVivsFunc();

        long VideoInitSDK();

	HRESULT VideoLogin(char* pszServer, unsigned short nServerPort, char* pszUserName, char* pszPassword);
}

VivsFunc.cpp

CVivsFunc::CVivsFunc()
{
	if (FAILED(CoInitialize(NULL)))
	{
		printf("Unable to initialize COM");
	 }
}
CVivsFunc::~CVivsFunc()
{
	CoUninitialize();
}

 long CVivsFunc::VideoInitSDK()
 {
	 if (FAILED(p_vivs.CreateInstance(__uuidof(VivsBasic))))
	 {
		 return -2;
	 }
	 if (FAILED(p_plan.CreateInstance(__uuidof(CarousePlan))))
	 {
		 return -3;
	 }
	 if (FAILED(p_events.CreateInstance(__uuidof(IDispatch))))
	 {
		 return -4;
	 }

	// VideoInitEvents();
	 return 1;
 }
long CVivsFunc::VideoInitEvents()
 {
	long formHandle = 1;
	long timeStamp = 1;
	float speed = 1.0;
	 // Methods:
	 HRESULT hr = S_OK;
	 try
	 {
		 p_events->VodTimeChangeEvent (
		 formHandle, timeStamp, speed);
	 }
	 catch (_com_error e)
	 {
		 printf("event error!");
	 }
	 return hr;
 }

HRESULT CVivsFunc::VideoLogin(char* pszServer, unsigned short nServerPort, char* pszUserName, char* pszPassword)
{
	HRESULT hr = 1;
	try 
	{
		hr = p_vivs->Login(pszServer, nServerPort, pszUserName, pszPassword);
		if (SUCCEEDED(hr))
		{
			printf("Login Successful!");
		}
	}
	catch (_com_error e)
	{
	}
	return hr;
}