Hello, i am developing a bidding system that will be used across a network. Could someone please help me on the network code to interconnect the server and the clients from each end and also the code for sending the data across the network

What database if you plan to use any and is your app to be accessed locally by client systems or over the internet?

am using an access 2003 database and yes my app will be accessed locally by client systems

You need to store the database file in a centralized server to which all the connecting systems has read write access.