Authentication server for VBA/Excel clients

A TCP/IP Windows based server prototype alongwith development environment setup on my pc. Two tasks: 1. Develope a simple prototype of server that can accept login/passwd based authentication request from multiple clients. The server gets request from remote clients and authticate them using information stored in an VBA/Excel app running locally on the server. 2. Setup the development environment on my pc so further feature addition can be done by me.