Visual boy advance 1.7.2(cheats)

how i can use this option because i dont understand, this is like the gameshark or what?

Yes, it is gameshark, you have to import a code I think with File then Import then whatever option from there.

actually, it's both Gameshark and Codebreaker. Although for me, you have to put both Gameshark and Codebreaker codes in the "Add Codebreaker Code" section