线程的创建步骤如下：

1.声明成员函数

UINT myThread(LPVOID pParam);

2.建立线程(仔细阅读以下代码）

AfxBeginThread(LThread,this);		//添加声明线程的名字

//说明AfxBeginThread()返回值为CWinThread 类的指针，用类的指针来调用类的成员函数
/*
CWinThread* AfxBeginThread(
   AFX_THREADPROC pfnThreadProc,
   LPVOID pParam,
   int nPriority = THREAD_PRIORITY_NORMAL,
   UINT nStackSize = 0,
   DWORD dwCreateFlags = 0,
   LPSECURITY_ATTRIBUTES lpSecurityAttrs = NULL 
);
CWinThread* AfxBeginThread(
   CRuntimeClass* pThreadClass,
   int nPriority = THREAD_PRIORITY_NORMAL,
   UINT nStackSize = 0,
   DWORD dwCreateFlags = 0,
   LPSECURITY_ATTRIBUTES lpSecurityAttrs = NULL 
);



*/

3.线程函数

UINT LThread(LPVOID pParam)
{
    //编写该线程需要做的工作
    //   ......
    return 0;
}

本人用的版本是VS2017 Enterprise