Passing info to PayPal via form button
I have a pdf form for registration for art classes. This form has several checkboxes (to select the classes they wish to take). I have created a paypal button for each of the classes (I need to track the number of people who pay because the classes are limited). I would like to have a button on my pdf form that is labeled "add to cart" and when that button is pressed the PayPal cart is displayed and there is an items for each checkbox selected on my form. Is this possible? If so, any help would be greatly appreciated.
