@echo off
setlocal
color 9f
echo.
set /p _Search=String to search for:
echo Searching for %_Search% in [%1]

set _ext=%~x1
if "%_ext%"=="" goto s_folder

find /i "%_Search%" %1
echo.
pause
goto :eof

:s_folder
for /r %1 %%G in (*.*) do (
find /i "%_Search%" "%%G")

echo.
pause