PayPal API Developer VB

I want to link PayPal merchant account to a custom shopping cart. The cart is fully finished, amounts, invoices etc etc. The only part I need is the block of code (and any dll's) to redirect values to PayPal...nothing more. I do no want many files and not a full project. I only need to take the final amounts from the shopping cart to PayPal and then back to my site. I need the script in VB