@echo off
:: Author: Robert Lie (mobilefish.com)
::  
:: This batch file displays a message
:: Usage 1: display.bat -1
:: Usage 2: display.bat -2 test

:: init variable
:: Do not put a space before or after the =
set msg1=hello

if "%1"=="-1" set display=%msg1%
if "%1"=="-1" goto print
if "%1"=="-2" set display=%2
if "%1"=="-2" goto print

echo Usage error
echo unrecognized arg '%1'
goto done

:print
echo Message = %display%

:done