Solve : if exist?

1.	Solve : if exist?
Answer» hello you know that we USE if exist to look if a folder or a file exist. what if I want to see if a registry key exist thanks you can use a TOOL like reg.exe. do a query to the registry with it, then check for errorlevel. (or you can grep for expected error MESSAGES that reg.exe gives)THANK you M.r ghostdog74 for replaying but I don't know how to use error level and I want to do that by CMD script not by any other tools thanks again

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