which

@echo off
setlocal Enabledelayedexpansion
if "%1" == "/?" echo it is which & goto :eof

if "%1" == "" (
	set /p file=write the file:
) else (
	set file=%1
)
set fdir=%cd%
set p=%PATH%
set p=%cd%;%p%

:start

for /f "delims=; tokens=1,*" %%i in ("%p%") do (
	set p=%%j
	set direc=%%i
	cd !direc!

	if EXIST !file! (
		echo !direc!\!file!
		cd "!fdir!"
		goto :eof
		endlocal
	)



	set e=%pathext%

	:ex
	for /f "delims=; tokens=1,*" %%i in ("!e!") do (
		set e=%%j
		set exp=%%i
	)
	if EXIST !file!!exp! (
		echo !direc!\!file!!exp!
		cd "!fdir!"
		goto :eof
		endlocal
	) else (
		if "!exp!" == ".MSC" (
			goto :start
		) else (
			goto :ex
			endlocal
		)
	)

)
rem if "!p!" == "" (
		echo none
		goto :eof
		endlocal
	rem )