basic user system

hi there, i neeed help with a basic project im working on, it isnt a project just that im learning about visual basic from a book and i have gotten so far with but now i'm stuck.. i have attached a .zip with the module n forms i have put together.. it's very simple, just need someone to make it work. this is what i need done.. customer form where i can add details of customers and view them in a list box, i need to be able to highlight one in the list box and click edit to be able to edit information, dnt need anything to advanced. need a stock file, where i can add stock id, product name, product information, total stock, need an order form where i can type in customer id, stock id, and give this an order ID. need the relatioship setup so that customer id and stock id llink together. saving method would be saving to a .dta file..