Windowsの下でCThreadパッケージクラスを実現

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

using namespace std;

class CThread 
{
public:
    CThread();
    virtual DWORD Run();
    bool Start();
    bool Join(DWORD nMillSec = 200);

private:
    static DWORD WINAPI RunThread(LPVOID pParam);
    HANDLE m_hThread;
    LPVOID m_pParam;
    DWORD m_nRet;
    bool m_bStart;
};

CThread::CThread()
{
    m_hThread = NULL;
    m_pParam = NULL;
    m_nRet = 0;
    m_bStart = false;
}

DWORD CThread::Run()
{
    return 0;
}

bool CThread::Start()
{
    m_bStart = true;
    m_hThread = CreateThread(NULL, 0, &RunThread, this, 0, NULL);
    
    if (!m_hThread)
    {
        m_bStart = false;
        return false;
    }
    
    return true;
}

bool CThread::Join(DWORD nMillSec)
{
    while (m_bStart)
        Sleep(nMillSec);

    if (FALSE == GetExitCodeThread(m_hThread, &m_nRet))
        return false;
    else
    {
        CloseHandle(m_hThread);
        return true;
    }
}

DWORD WINAPI CThread::RunThread(LPVOID pParam)
{
    CThread* pThis = (CThread*)pParam;
    DWORD nRet = pThis->Run();
    pThis->m_bStart = false;
    return nRet;
}

class MyThread : public CThread
{
public:
    DWORD Run();
};

DWORD MyThread::Run()
{
    cout << "..." << endl;
    return 0;
}

int main(int argc, char **argv)
{
    MyThread my;
    my.Start();
    my.Join();
    return 0;
}