题目要求：点击抢红包后，先将第一个编辑框的值设置为1000，然后创建三个线程，让右边的编辑框值依次设置为1000（用事件完成）

// MutexExDlg.h : 头文件//#pragma once// CMutexExDlg 对话框class CMutexExDlg : public CDialogEx{// 构造public:    CMutexExDlg(CWnd* pParent = NULL);    // 标准构造函数// 对话框数据    enum { IDD = IDD_MUTEXEX_DIALOG };    protected:    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持    static HANDLE hThread[3];    static HANDLE m_Mutex;    static HANDLE m_Event;    static DWORD WINAPI ThreadProc0(LPVOID lpParameter);    static DWORD WINAPI ThreadProc1(LPVOID lpParameter);    static DWORD WINAPI ThreadProc2(LPVOID lpParameter);    static DWORD WINAPI ThreadProc3(LPVOID lpParameter);// 实现protected:    HICON m_hIcon;    // 生成的消息映射函数    virtual BOOL OnInitDialog();    afx_msg void OnPaint();    afx_msg HCURSOR OnQueryDragIcon();    DECLARE_MESSAGE_MAP()public:    virtual BOOL PreTranslateMessage(MSG* pMsg);    afx_msg void OnBnClickedButton1();    static int m_Edit0;    static int m_Edit1;    static int m_Edit2;    static int m_Edit3;};

// MutexExDlg.cpp : 实现文件//#include "stdafx.h"#include "MutexEx.h"#include "MutexExDlg.h"#include "afxdialogex.h"#ifdef _DEBUG#define new DEBUG_NEW#endif// CMutexExDlg 对话框CMutexExDlg::CMutexExDlg(CWnd* pParent /*=NULL*/)    : CDialogEx(CMutexExDlg::IDD, pParent){    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);}void CMutexExDlg::DoDataExchange(CDataExchange* pDX){    CDialogEx::DoDataExchange(pDX);    DDX_Text(pDX, IDC_EDIT1, m_Edit0);    DDV_MinMaxInt(pDX, m_Edit0, 0, 1000);    DDX_Text(pDX, IDC_EDIT2, m_Edit1);    DDV_MinMaxInt(pDX, m_Edit1, 0, 1000);    DDX_Text(pDX, IDC_EDIT3, m_Edit2);    DDV_MinMaxInt(pDX, m_Edit2, 0, 1000);    DDX_Text(pDX, IDC_EDIT4, m_Edit3);    DDV_MinMaxInt(pDX, m_Edit3, 0, 1000);}BEGIN_MESSAGE_MAP(CMutexExDlg, CDialogEx)    ON_WM_PAINT()    ON_WM_QUERYDRAGICON()    ON_BN_CLICKED(IDC_BUTTON1, &CMutexExDlg::OnBnClickedButton1)END_MESSAGE_MAP()// CMutexExDlg 消息处理程序BOOL CMutexExDlg::OnInitDialog(){    CDialogEx::OnInitDialog();    // 设置此对话框的图标。  当应用程序主窗口不是对话框时，框架将自动    //  执行此操作    SetIcon(m_hIcon, TRUE);            // 设置大图标    SetIcon(m_hIcon, FALSE);        // 设置小图标    // TODO:  在此添加额外的初始化代码    return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE}// 如果向对话框添加最小化按钮，则需要下面的代码//  来绘制该图标。  对于使用文档/视图模型的 MFC 应用程序，//  这将由框架自动完成。void CMutexExDlg::OnPaint(){    if (IsIconic())    {        CPaintDC dc(this); // 用于绘制的设备上下文        SendMessage(WM_ICONERASEBKGND, reinterpret_cast
     
      (dc.GetSafeHdc()), 0);        // 使图标在工作区矩形中居中        int cxIcon = GetSystemMetrics(SM_CXICON);        int cyIcon = GetSystemMetrics(SM_CYICON);        CRect rect;        GetClientRect(&rect);        int x = (rect.Width() - cxIcon + 1) / 2;        int y = (rect.Height() - cyIcon + 1) / 2;        // 绘制图标        dc.DrawIcon(x, y, m_hIcon);    }    else    {        CDialogEx::OnPaint();    }}//当用户拖动最小化窗口时系统调用此函数取得光标//显示。HCURSOR CMutexExDlg::OnQueryDragIcon(){    return static_cast
      
       (m_hIcon);}// 重写虚函数 PreTranslateMessage 屏蔽掉Esc键和Enter键BOOL CMutexExDlg::PreTranslateMessage(MSG* pMsg){    if (pMsg->message == WM_KEYDOWN)    {        int keyCode = (int)pMsg->wParam;        if (keyCode == VK_ESCAPE || keyCode == VK_RETURN)        {            return TRUE;        }    }    return CDialogEx::PreTranslateMessage(pMsg);}HANDLE CMutexExDlg::m_Mutex = NULL;HANDLE CMutexExDlg::m_Event = NULL;int CMutexExDlg::m_Edit0 = 0;int CMutexExDlg::m_Edit1 = 0;int CMutexExDlg::m_Edit2 = 0;int CMutexExDlg::m_Edit3 = 0;HANDLE CMutexExDlg::hThread[3] = { NULL };// 抢红包按钮点击事件处理函数void CMutexExDlg::OnBnClickedButton1(){    // 获取编辑框内容到str变量    CString str;    GetDlgItem(IDC_EDIT1)->GetWindowText(str);    // CString 转 int    m_Edit0 = _ttoi(str);    m_Edit1 = 0;    m_Edit2 = 0;    m_Edit3 = 0;    // 这里需要创建一个线程 因为 WaitForMultipleObjects 会阻塞住 另外把this指针作为参数传递给线程，用于子线程更新编辑框内容    HANDLE hThread0 = ::CreateThread(NULL, NULL, ThreadProc0, this, NULL, NULL);    CloseHandle(hThread0);}DWORD WINAPI CMutexExDlg::ThreadProc0(LPVOID lpParameter){    CMutexExDlg* pDlg = (CMutexExDlg*)lpParameter;    // 创建一个事件    m_Event = ::CreateEvent(NULL,        FALSE, // FALSE 代表 WaitForSingleObject到之后，事件还是未通知状态，需要手动设置已通知状态        FALSE,  // FALSE 代表 事件创建完之后，不能马上被 WaitForSingleObject 到        NULL);    // 创建三个线程抢红包    hThread[0] = ::CreateThread(NULL, NULL, ThreadProc1, lpParameter, NULL, NULL);    hThread[1] = ::CreateThread(NULL, NULL, ThreadProc2, lpParameter, NULL, NULL);    hThread[2] = ::CreateThread(NULL, NULL, ThreadProc3, lpParameter, NULL, NULL);    // 设置编辑框内容    ::SetWindowText(::GetDlgItem(pDlg->m_hWnd, IDC_EDIT1), L"1000");    // 将对象设置为已通知状态    ::SetEvent(m_Event);    // 使用WaitForMultipleObjects监听所有线程，当线程全部结束后，调用CloseHandle关闭句柄.    WaitForMultipleObjects(3, hThread, TRUE, -1);    ::CloseHandle(hThread[0]);    ::CloseHandle(hThread[1]);    ::CloseHandle(hThread[2]);    ::CloseHandle(m_Mutex);    return 0;}// 线程回调函数1DWORD WINAPI CMutexExDlg::ThreadProc1(LPVOID lpParameter){    CMutexExDlg* pDlg = (CMutexExDlg*)lpParameter;    while (true)    {        WaitForSingleObject(m_Event, -1);        ::SetWindowText(::GetDlgItem(pDlg->m_hWnd, IDC_EDIT2), L"1000");        Sleep(2000);        // 将对象设置为已通知状态        ::SetEvent(m_Event);    }    return 0;}// 线程回调函数2DWORD WINAPI CMutexExDlg::ThreadProc2(LPVOID lpParameter){    CMutexExDlg* pDlg = (CMutexExDlg*)lpParameter;    while (true)    {        WaitForSingleObject(m_Event, -1);        ::SetWindowText(::GetDlgItem(pDlg->m_hWnd, IDC_EDIT3), L"1000");        Sleep(2000);        // 将对象设置为已通知状态        ::SetEvent(m_Event);    }    return 0;}// 线程回调函数3DWORD WINAPI CMutexExDlg::ThreadProc3(LPVOID lpParameter){    CMutexExDlg* pDlg = (CMutexExDlg*)lpParameter;    while (true)    {        WaitForSingleObject(m_Event, -1);        ::SetWindowText(::GetDlgItem(pDlg->m_hWnd, IDC_EDIT4), L"1000");        Sleep(2000);        // 将对象设置为已通知状态        ::SetEvent(m_Event);    }    return 0;}