if Guy A copied your code, and i got it off him, you can sue him for violation of contract but you cant stop me, a third party. Your ability to sue him will be

if Guy A copied your code, and i got it off him, you can sue him for violation of contract but you cant stop me, a third party. Your ability to sue him will be limured, he cant go to jail, he can deckare bancrupsy, and you have to be spesific about what is protected, 'idea' is a vague term that cant be protectedm