@ECHO OFF
ECHO.

:: Windows version check
IF NOT "%OS%"=="Windows_NT" GOTO Syntax
ECHO.%* | FIND "?" >NUL
:: Command line parameter check
IF NOT ERRORLEVEL 1 GOTO Syntax
IF NOT [%2]==[] GOTO Syntax

:: Keep variable local
SETLOCAL

:: Initialize variable
SET WSS=

:: Parse command line parameter
IF NOT [%1]==[] FOR /F "tokens=1 delims=\ " %%A IN ('ECHO.%~1') DO SET WSS=%%A

:: Use NET VIEW and NBTSTAT to find computers and logged on users
FOR /F "tokens=1 delims=\ " %%a IN ('NET VIEW ^| FIND /I "\\%WSS%"') DO FOR /F "tokens=1 delims= " %%A IN ('NBTSTAT -a %%a ^| FIND /I /V "%%a" ^| FIND "<03>"') DO ECHO.%%a    %%A

:: Done
ENDLOCAL
GOTO:EOF

:Syntax
ECHO ACTive USeRs, Version 1.00 for Windows NT
ECHO Display logged on users and their workstations.
ECHO.
ECHO Usage:    ACTUSR  [ filter ]
ECHO.
IF     "%OS%"=="Windows_NT" ECHO Where:    filter is the first part of the computer name^(s^) to be displayed
IF NOT "%OS%"=="Windows_NT" ECHO Where:    filter is the first part of the computer name(s) to be displayed
ECHO.
ECHO Example:  ACTUSR PC
ECHO.
ECHO PC0001    USERID_1
ECHO PC0004    USERID_4
ECHO PC0102    ADMINISTRATOR
ECHO.
ECHO Written by Rob van der Woude
ECHO http://www.robvanderwoude.com