Hello! I would like to ask if anyone can explain the mechanism of the payment gateway of paypal, how can I use shopping cart developed by ASP.NET to proceed checkout, what data and how I can pass those data to paypal, please kindly help, thanks!

To connect to paypal, first u have to add their web reference to ur application,by right clicking the "bin" folder and clicking the "add web reference" option.."Paypal" allows u to test ur application with their web service, through developer.paypal.com site.. Go into the site and read the contents carefully, u will get an idea.. I am very much confident about this, because i have implemented the same in one of my application....

Here are a few articles:

http://west-wind.com/WebLog/posts/802.aspx
http://www.devsource.com/article2/0,1759,1766266,00.asp

Thanks

Thanks very much!

Good info links, Thx man