anchor.diff:  echo Options:
   echo   -?         Display this help
   echo   -r         Remove all paths added by this script
  +echo   -S         No-System mode: Do not also set persistent system variables
   echo   -V         Display the script version and exit
   echo   -X         Display the commands generated and exit
   echo.
  
positive.code: if "%~1"=="/?" goto :Help
  if "%~1"=="-?" goto :Help
  if "%~1"=="-r" call :Remove & goto :addpath.exit
  if "%~1"=="-v" set "VERBOSE=1" & goto :next_arg
  if "%~1"=="-V" (echo.%VERSION%) & goto :eof
  if "%~1"=="-X" set "CALL=echo" & set "EXEC=rem" & goto :next_arg
  
negative.code: if exist "%~1" (
    %CALL% %ADDPATH% -q    -a "%~1"
    if errorlevel 1 set "RETCODE=1"
    if not "%NOSYSTEM%"=="1" (
      %CALL% %ADDPATH% -q -s -a "%~1"
      if errorlevel 1 set "RETCODE=1"
    )
  )
  exit /b %RETCODE%
  
  