変数内の文字列を検索するコマンドのサンプル

findString.bat

echo off
set hoge="aaatestxxx"

@echo %hoge% | find "test" > NUL
echo %errorlevel%
if errorlevel 1 (
	echo error!!
) else (
	echo OK!
)
@echo %hoge% | find "xtesta" > NUL
echo %errorlevel%
if errorlevel 1 (
	echo error!!
) else (
	echo OK!
)
pause