This comprehensive reference provides developers with the information they need to develop new applications or move existing applications to handheld devices and other resource-constrained hardware. It offers specific techniques for writing mobile applications, including developing GUI elements using Web Forms, transferring data using XML Web services, working with local and remote data sources, and developing applications that can operate in a disconnected state from the wireless network. The book illustrates each technique with working code samples in Visual Basic .NET and Visual C#(tm) .NET. It also includes a quick reference appendix showing the differences between the .NET Compact Framework and the full .NET Framework.