is it possible to store info in code

I was wondering if it is possible information in a program eg. license key
instead of storing it in a text file or the registry.

You can only store information into variables/arrays until the program is unloaded.. The only other way other then putting it into a file is to make a program that stays hidden in memory that holds the info. But the only problem with that is if that computer is rebooted, the info is gone unless that program saves the information to a file or the registry

Sure you can. You can put it in a resource file and include it in the exe. You really should encrypt it first though.