VB Language?

I am gonna be looking at some popular VB virus codes (VBS.LoveLetter, etc.). And I'm gonna be fooling around with it to see if I can add/remove pieces of the codes and test them on my older testing computer. But first I will need to know the basic/most used codes used in VB virus making in order to analyze the virus codes and then make changes and save/test them. I am interested in seeing how these codes work. Does anyone here that studies VB codes know where I can find basic and important codes/commands on the net for VB virii? Thanks