Remote service requests are generally created for you by default if you use a WSDL operation message as the binding fragment. The process of submitting the action will bind the HTML fields to the XML structure on the server. The Controller then passes this information to the proxy service, which will perform the necessary wrapping and submission.
You only need to intervene if you wish to perform additional processing on the server Controller before submission. We will cover this under the section on Business Rules, Composition and Orchestration. A detailed explanation on this aspect is also included in under the Advanced Options section.