VC++监测键盘上每一按键的变化，应用了HOOK，键盘钩子，运行截图如上所示，当敲击键盘上的任一个按键时，程序都会检测到，并弹出窗口，告诉用户按下的是哪个键。

-VC++ to monitor each key on the keyboard changes, the application of the HOOK, the keyboard hook, run the screenshot shown above, when the hit any key on the keyboard, the program will be detected, and the pop-up window, which tells the user pressed key.