[kiripanda]

Код:

@echo off
setlocal enableextensions

set sString=bla-bla-bla add bla-bla-bla
echo "%sString%" |findstr /C:add >nul &&echo Yes ||echo No

set sString=bla-bla-bla ad bla-bla-bla
echo "%sString%" |findstr /C:add >nul &&echo Yes ||echo No

endlocal