no there isn't, it has no ecommerce functionality. One could potentially implement a custom form submission handler that redirects to paypal after form submission, but this would be custom based on specific needs of your own and whatever relationship there may be between the custom form values and the order amount or other info that you may wish to process just prior to redirecting.
If you want to build a custom form with a PayPal button, see our developer tutorial Building a Simple PayPal Buy Now button, you could easily add textboxes and other asp.net controls to such a form.
Note that if you make a form that posts to PayPal it posts directly to paypal and away from your site so there is no way to do server side processing on your own site and post to paypal at the same time, a buy now button must post directly to paypal, so such a thing would bypass form wizard pro's server side processing of the submitted data and the data would therefore not be captured. About the only way we could ever do something like that with Form Wizard Pro is to make a multi page form where the last page would be after we collected all our form data and a new form that posts to paypal would then be shown. Implementing such a thing has crossed my mind but I'm not making any promises to implement it at this time. Any good developer could extend form wizard to do such a thing, ie implement a custom form submisison handler to process the data and redirect to your own custom page that has a paypal buy now button for the user to complete the order based on the processed form fields.
I'm also pondering ways to integrate Form Wizard Pro into other things like Event Calendar Pro and WebStore but can't make any promises about it at this time.