Thanks a lot , finally I got help, I will try later. But after I read your answer, I have some new questions. 1. After customers pay money, looks redirectino is not necessary, so how I can get information about customer pay or not. If I need implement IPN or PayPaly will call my notify page automatically ? 2. What's the parameter? If PayPal call my Cancel Page, Return Page or Notify Page, what are there parameters? Could you give a list? 3. May I test Cancel Page, Return Page or Notify Page with test account? I implement a onlime payment interface in China. I only can test return page at my local computer. If I want to test notify page then I have to publish my web site. It's same for PayPal? If it is not then may I use same way to test it? Is there any document describe something about how PayPal call my Notify page, Cancel page or Return page. When I implemented the payment interface in China, there is a document tell me all parameters, how to tell caller it is OK or not OK or recall again, how oftern my return page,and notify page will be called. PayPal has these docuements? If have then please tell me the download address. Thanks a lot.
... View more