code:

---

@echo off
rem
rem INGRP32.EXE is a Win32 executable enabling you to
rem check for membership of a global and / or local group.
rem
rem  Usage : INGRP32 [ group name ]    (eg : INGRP32 "Domain Users")
rem
rem  returns :  errorlevel 0  = not a member of group
rem             errorlevel 1  = member of global group
rem             errorlevel 2  = member of local group
rem             errorlevel 3  = some sort of API error
rem
ingrp32 %1
if errorlevel 3 goto err
if errorlevel 2 goto local
if errorlevel 1 goto global
goto end
:global
echo Member of global group
goto end
:local
echo Member of local group
goto end
:err
echo Huh ?. API error occured
:end

---