Currently I don't know of a way to control a LabVIEW app with a hand held. To control an app using embedded VI's on a web-page you have to have at least the run-time engine on the hand held. This currently doesn't exist. You could write a embedded c++ code for your IPAQ that incorporates TCP/IP communication. Then you could use the TCP/IP VI in LabVIEW to communicate with the hand held.