@echo off
REM (C) litchie@newsmth, Aug 15, 2007
if %1x==x goto usage
set mypath=%PATH%
set fullmatch=0
:continue
if "%mypath%" =="" goto failend
for /f "tokens=1,* delims=;" %%i in ("%mypath%") do set item=%%i& set mypath=%%j
set filename=%item%\%1
REM When fully matched, it is possibly a directory
REM so better not stop  
if exist "%filename%" set fullmatch=1&echo %filename%
set filename=%item%\%1.bat
if exist "%filename%" goto found
set filename=%item%\%1.exe
if exist "%filename%" goto found
set filename=%item%\%1.cmd
if exist "%filename%" goto found
goto continue

:FailEnd
if %fullmatch%==0 echo no %1 in [%PATH%]
goto end

:usage
echo Usage: which command
echo Prints the absolute path of the command.
goto end

:found
echo %filename%

:end