Anti-Debugging

I have always been afraid to release my programs because i didn't want people to crack it, but recently I just thought to myself and decided that if somebody is desperate enough and has no life to just sit and crack my program then so be it, but I will add just the most rudimentary and basic little defenses so the person doing it has to atleast know more than the normal cracker. So that means i will encrypt my strings and so on. There is one thing that I want to know how to do. And that is, when i was debugging my app with ollydbg in the middle box it was displaying the c++ code for that line of asm. I thought that variable names were destroyed when compiled, but apparently not. And it wrote what file in my app it came from like "globals.h". How do i atleast stop this? I know that everyone does it but idk how. Thanks.

People who most likely will know the answer:
@.::SCHiM::.
@Hassan
@Jason
@Jetamay
@Hell_Demon
@Void