Webform Association and IntegrationService

Summary

Webform Association and IntegrationService

Content

Hello,

I am using the webform that has a text box (say empid), and have written on change (event) of this textbox, i intend to invoke an external integration service to fetch few information about this employee by passing the Empid.

I would like to know the following things, a) The focus has to be in the same page where other fields have to to be entered/typed later (this service should fetch and return the results that has to be populated in other text fields).  b) How can i associate the Input to the service from FORM fields to the service and associate the output from that service back to FORM Fields to populate ?