新建一个基于对话框的应用程序SingleThread，在主对话框IDD_SINGLETHREAD_DIALOG添加一个按钮，ID为IDC_SLEEP_SIX_SECOND，标题为“延时6秒”，添加按钮的响应函数-Create a new dialog-based application SingleThread, in the main dialog IDD_SINGLETHREAD_DIALOG add a button, ID for the IDC_SLEEP_SIX_SECOND, entitled " delay 6 seconds" , the Add button in the response function