>What if the website that process credit cards can only accept POST parameters. Can i pass a parameter to it using wwXML class?
>
>e.g. of web service: https://www.skipjackic.com/scripts/EvolvCC.dll

Yes, but you'll have to potentially format the data you post. wwXML only supports raw POST buffers. wwIPStuff/wwClient supported proper formatting of the data for different types of HTTP requests.

That's basically how I talk to LinkPoint - I post HTTP Form variables to them using wwHTTP...