Passing values between adf application and web services

Question

hi i have a situation where i have jsff page which got username,surname,lastname,email i what to pass this value to my webservices how can i do that. this is how i create my webservicesright click viewControler->web services->web services Data Control
i what to pass the value to webservices workflow i already have a screen in my workflow now i what to pass the adf application values to that webservices am in jdeveloper 11.1.1.6.0
i try this
<af:inputText simple="true"
                        required="#{bindings.Username.hints.mandatory}"
                        columns="#{bindings.Username.hints.displayWidth}"
                        maximumLength="#{bindings.Username.hints.precision}"
                        shortDesc="#{bindings.Username.hints.tooltip}" id="it1"
                        value="#{bindings.Username.inputValue}">
            <f:validator binding="#{bindings.Username.validator}"/>
            <af:setPropertyListener from="#{bindings.Username.inputValue}"
                                    to="#{bindings.start_user_details}"
                                    type="action"/>
          </af:inputText>

Answer 1

i make my webservices to pass values
<af:inputText simple="true"
                        required="#{bindings.Username.hints.mandatory}"
                        columns="#{bindings.Username.hints.displayWidth}"
                        maximumLength="#{bindings.Username.hints.precision}"
                        shortDesc="#{bindings.Username.hints.tooltip}" id="it1"
                        value="#{bindings.Username.inputValue}">
            <f:validator binding="#{bindings.Username.validator}"/>
            <af:setPropertyListener from="#{bindings.Username.inputValue}"
                                    to="#{bindings.approveUser_username}"
                                    type="action"/>
          </af:inputText>
but am geting error reference approveUser_username not found