This request is used to pass the current input mode to the Keyboard device driver. The Keyboard device driver maintains the mode separately for each session. The caller can interrogate the mode using KBD_GETINPUTMODE. The mode is also returned on every call to KBD_READCHAR, and KBD_PEEKCHAR. The default input mode is ASCII. The physical device driver uses the mode when processing CTL functions and reporting the shift state, if Shift Report is set on.