InfoPath Dev

I have a form that have an identification number. Thet number is an employee code and I have already written a web service that retrieves the employee name. This is the 1st time I work with InfoPath. I am trying to do a programming interface on the ValidateEvent for the ''identificationNumber'' field where I need to call the web service and ...

My company just installed InfoPath 2007. My initial question is as follows: As we start development of forms there will be a need to connect to the back end system which is db2 based (AS/400). We will need to validate entries (example employee code), retrieve employee name, customer name etc and also evetually update the back end system. What is ...