You add drivers for Windows CE when you build the CE image that runs on the eBox-2300.  Just by working through the eBox-2300 Jump Start Guide, you will automatically add the necessary drivers. ;)

http://www.embeddedpc.net/download/doc/eBox2300_CE60_JumpStart_Rev3.5.pdf

You can use Microsoft's documentation to figure out what classes within the .NET CF framework you'll need to use for socket communications.

Here are some useful links to get started.

http://msdn.microsoft.com/newsgroups/topic.aspx?url=/MSDN-FILES/028/201/295/topic.xml

http://msdn2.microsoft.com/en-us/embedded/aa731407.aspx

Best Regards!