Keys that can and can’t be tested

Keys that can’t be tested

There are a number of special keys that are used by the operating system for various purposes. In general it is not possible to use KeyboardTest to test these keys. The list of special keys will vary from keyboard to keyboard but includes. PrintScreen, Sleep & Power. There is a 2nd group of keys that can be detected by KeyboardTest but which also result in other actions (like opening a Window or application). On most keyboards only the left and right Windows keys fall into this category. Using the Filter systems keys feature can help to tests these keys in some circumstances.

Keys that can be tested

All the other keys, including the Numeric keypad, Functions keys, Shift and Ctrl keys can be tested.