Acknowledgments We would like to thank the following individuals for their generous contributions to the making of this book. A very special thanks goes out to Wei Hua for developing all of the Visual Basic examples on our companion CD-ROM. Wei also helped us understand I/O completion ports and transport service providers in the Winsock 2 SPI. Thanks to Barry Butterklee for helping us understand I/O completion ports. Barry also reviewed the QOS chapter to ensure its accuracy. Amol Deshpande provided valuable information on IFS handles in Winsock 2 layered service providers. He also lent us his expert debugging skills on our LSP example. Frank Li provided the original RNR example that was the basis for Chapter 10. Frank also developed some of the IP Helper examples included on the CD-ROM. Arvind Murching and Anshul Dhir answered many questions concerning the ATM Winsock provider. Alex Choe (who understands practically every network protocol used today) helped us with the details of...