What do you mean by "entire database"? You need to find your values in tables only, or in object definitions, too?
I assume the former. In this case, you don't have to really know the structure of your DB. Try those views below. With them, you can construct your select queries on all the tables / colums. Just filter out non-*char columns, views and system tables, and you're ready to go - you can "automatically" generate multiple select statements.
select top 100 * from information_schema.tables
select top 100 * from information_schema.columns
The other option, is to use some addon to SSMS, like this one:
http://www.ssmstoolspack.com/
It has an option to search entire database.
But be advised, that both solutions will have a great impact on performance of your server.