Code is not always requested just for the purpose of representing the applicant. Sometimes interviewers (like me) just want to have code to hand which you are guaranteed to be familiar with; It's nicer to reference code you've actually written to ask specific questions about, say, stack vs heap usage or OO design.

"Here's my website, go look at some of the open source code I've published" tends to work well. The more code you throw at people the better -- that way it's clear that you're not hiding a large volume of garbage while showing them a few good lines of code.

This is where contributing to open source really comes in handy. For one of my earlier jobs I was unable to show any code from previous employers but had a project on SourceForge. From what I heard, it helped land me the job.

Perhaps you can just say "here's something I've built, completely by me."--I don't seen how a few lines of code is going to say much, writing neat code is like comp sci. 101.