What Is A Code For Shiny Pokemon On Pokemon Gold In Vba In Pokemon Shiny Gold, How Do You Enter Gameshark Codes For VBA?

In Pokemon Shiny Gold, how do you enter gameshark codes for VBA? - what is a code for shiny pokemon on pokemon gold in vba

I have some sites with code like the following:
http://www.supercheats.com/gameboy/pokem ...
But I do not know how to enter. If you do, or not logged on, or simply will not work. Do I need a teacher first code? HELP!