Ahh i used Walsh's book too in order to learn DirectX. Cant really help with your book-specific query however as I have '..........with DirectX 9.0' from 2003 instead.
You mentioned the code is for a server-based game. If its the functions that power the server that have you wondering then you can probably find some resources online since that has little specifically to do with the directx stuff. Without being more sure what your after I cant really provide links. Maybe look into some csp (c++ server pages) tutorials and the like. If specifically looking to embed a server into a c++ app in order to produce a web application then might want to look at Wt (http://www.webtoolkit.eu/wt
Also looks good, being a little embedded c++ web server