键盘与鼠标器是当前微型计算机的两种最常用输入设备.为了用户的使用方便,一个应用软件的交互界面(菜单和光标等)往往需要既能由键盘来控制,又能由鼠标器来控制.实现这种应用软件的一般方法是在编写这种应用程序时既考虑键盘输入又考虑鼠标输入,这样程序的编写工作将很繁琐. Keyboards and mice are two of the most commonly used input devices for today’s microcomputers. For ease of use, an application’s interactive interface (menus and cursors, etc.) often needs to be controlled both by the keyboard and by the mouse. The general approach to this application is to write both the keyboard input and the mouse input in the preparation of such an application, so that the preparation of the program will be cumbersome.