Windows whereis

Save this script into whereis.bat, copy it into executable folder such as c:\windows

@echo off

setlocal

set FOUNDFLAG=0

:# Add the current directory to the path for duration of this program only.

set PATH=%PATH%;.

if exist "%~$PATH:1" ( echo Found at %~$PATH:1  && set FOUNDFLAG=1)

:# We want to look for each of the possible extensions that could be executed.

:# Replace . with space.

set SPEC=%PATHEXT:.= %

:# Replace ; with nothing.

set SPEC=%SPEC:;=%

:#Iterate across extensions, checking for each one on the path.

for %%a in (%SPEC%) do call :CHECK %1.%%a

goto :CLEANUP

:CHECK

if exist "%~$PATH:1" ( echo Found at %~$PATH:1 && set FOUNDFLAG=1 )

goto :EOF

:CLEANUP

if not %FOUNDFLAG% == 1 echo No runnable file found for %1

endlocal

goto :EOF