I would follow hisakimatama's recommendations on the validation of your backups.
However, to store the value returned by your restore statement, you could use dynamic code and sp_executesql to store the values into a table and fetch them from it.
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2