unpaid software source code copyright issue

[quincy]

A friend gave me a wonderful idea.
I wrote an email to that company to declare rights of my code and forbid them to use it.
Also I told them I will declare my rights to all potential customers in US.

I believe this is the best option I can have.

Thanks, quincy, Zigner and Stevef.
Your advice really help

I am not sure you own any rights in the code but good luck. I hope your email works to get you paid.

We all appreciate the thanks.