Thank you for your help,
I read the whole walkthrough and it gave me a good context.
I am trying to break the ice with XML web-services, but is being difficult to me. I am trying to find sample codes. My three big interrogatives are

1.) What data type can be pass as parameter to a web-service method. Is it the same like a normal UDF (Any type Character, numeric, date integer etc..) or does it have to be an XML file only?

2.) What data type can the WS method returns? Any or XML file only?

3.) How do I implement distribution? Does the computer that provides the service need to have VFP installed in order to register the service?

Can you point me to any help in this matter?