I work for a rural mountainous county. I have created an ArcReader document for them to use, so they have a map on their MDC (MDT) when they run out of broadband coverage. They saw this old Forum thread... http://forums.esri.com/Thread.asp?c=113&f=1142&t=176827#520999 And was hoping I could create this option for them in 10.0. I was wondering if anyone out there has some information to help get me started in programming the function of being able to have a GPS center their location on the map in their ArcReader.