The requirements for a basic VB winsock server are really fairly simple, once you get the hang of it..
Add a Winsock control to a form. Make sure you set its index to 0. (This way, it will become an array of winsock controls)
Then, tell the control to start listening on a specific port.
When connections are made, create new winsock controls in the index, and have that new connection accept the connection request.
Once you have the basics of that down, you can start handling the data sent to the server.
I suggest you start with something like this, and move up to API later. The need to understand the Winsock control is very minimal compared to all the things you have to do with API.. Though API is better, and less buggy.
Check out http://www.planetsourcecode.com for lots of server-client examples.. (Or just browse through the MSE source to see how sockets are done.. though MSE does it slightly different than I described above.)
Just google for it, there are thousands of such small programs to download.
