Creating and sending XML file on a web form --> HTTP Post

Hi,

Can anyone instruct me on how to create an XML file with the data a user inputs on the web form and then sending that XML file to a server using HTTP Post when the form is submitted?

Thanks in advance.

I do not understand the question. The post action when a form is submitted passes the form data in named pairs. You can build an XML file from the info on the server but what you want to do with it then is not clear.