text: @echo off
  keys /?
  set "keys="
  keys off
  echo %keys%
  set "keys="
  keys
  
  exit /b 0
  
  ::====
  demonstrates the effects of keys command.
  I've mentioned the command here http://ss64.org/viewtopic.php?id=1558
  and later in the thread Dave Benham discovered that the command sets an environemnt
  variable , which means that the help message is wrong - it  affects the current console.
  Keys does not relly on %keys% variable to display its state correctly
  ::=====
  