检测键盘的每个按键，当编译运行本程序后，你的鼠标和键盘操作将被监控，不管你按下了键盘上的任何键，它都将在窗口中显示出来-Detection of the keyboard each key, when compiled and run this program, your mouse and keyboard will be monitored, whether you press any key on the keyboard, it will be displayed in the wind