在窗口中用鼠标左键和右键单击时，窗口下方显示哪个键被点击，坐标是多少；当键盘上某个键被点击时，窗口下方显示这个键的名称。-In the window with the left mouse button and right-click, below the window display which key is to click, how much is the coordinate When the keyboard on a key is click, window below shows