In the DataView area you can connect your form to the WSDL of your web service. This will expose the inputs and outputs of your web service in the DataView tree. You can drag and drop the node in the webservice onto the field on the form that corresponds to that value. Now when the form executes the webservice in will take the bound values on your form and put them into the nodes of the web service call that you have specified. If there are any output values bound then when the Web Service returns the output all associated output values will be updated automatically as well.