新建一个对话框工程；

添加2个编辑框，2个按钮；

对话框头文件添加，

public:CWinThread *m_pthread1;CWinThread *m_pthread2;static UINT hellothread(LPVOID lparam);static UINT testthread(LPVOID lparam);CCriticalSection g_criticalsection;BOOL flag;int i1, i2;

对话框构造函数中添加，flag = true;

OnInitDialog()中添加，

	i1 = 0;i2 = 0;m_pthread1 = AfxBeginThread(hellothread, this, THREAD_PRIORITY_NORMAL, 0, 0);m_pthread2 = AfxBeginThread(testthread, this, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);

线程函数和按钮单击代码；

UINT CthrddemoDlg::hellothread(LPVOID lparam)
{CthrddemoDlg *threadol = (CthrddemoDlg*)lparam;while (threadol->flag){//threadol->g_criticalsection.Lock();threadol->i1 = threadol->i1 + 1;threadol->SetDlgItemInt(IDC_EDIT1, threadol->