DOS Function Template

Source: http://www.dostips.com/DtCodeCmdLib.php#Batch.FunctionTemplate

A function template with all features of a true DOS function

Description: The function template can be used as starting point for a new function. Complete the template into a useful function like this:

• Rename the function
• Add proper description for the function and its arguments
• Fill in the function body
• Return desired values

function.bat

:myFunctionName    -- function description here
::                 -- %~1: argument description here
  SETLOCAL
  REM.--function body here
  set LocalVar1=...
  set LocalVar2=...
  (ENDLOCAL & REM -- RETURN VALUES
      IF "%~1" NEQ "" SET %~1=%LocalVar1%
      IF "%~2" NEQ "" SET %~2=%LocalVar2%
  )
GOTO:EOF
rem or
EXIT /b