Please help me on obtaining "server" and "data source" in string connection for sql connection?

Dear Buddies:

I have a sql db with its application. I bring this program and the associated sql database to another computer. How can I get the "server" and "data source" of new computer for string connection in sql connection? I should mention that I do not have any info. about the guest computer and assume that the guest computer does not have any sql managemnt system, so my application should obtain the "server" and "data source" to work properly.