- Tell PayPal how to find your application and where to send the IPN messages in your IPN preferences.
Don't forget that the IPN feature have to connect to a WO app reachable from a public IP!
Starting in Wonder builds after mid-September 2009, you can use WOPayPal with the PayPal Sandbox. If you set this property :
All urls will use www.sandbox.paypal.com instead of www.paypal.com. Don't forget to register for a sandbox account!
That's pretty much the story of WOPayPal. I hope that this helps clarify what's going on in the framework, and how you can easily leverage it. At the very least, if you have a copy of the source code, you can copy out the relevant portions of the DirectAction class. Please let me know if you have further questions. I promise not to be so long-winded in the future.