UPDATE ⇒ In their previous version, when you need to import the library keyboard.h (french version) and execute the payload on Arduino, an error occurs with the ...
I just downloaded the latest Arduino IDE (overlaid with PJRC's Teensy code), version 1.8.2. I wanted to test the Teensy++ as a USB Keyboard, so I went to File > Examples > 09.USB > Keyboard > ...