Database apication Using VB

there are many approaches you can take...you should do some reading and see which approach you want to take...here are a few tutorials and code samples to look at:

http://www.vbweb.co.uk/topics/databases.htm

Refer to Data Access Guid - VB - MSDN help

http://www.vb-world.net/databases/

more tutorials for you

Also, keep in mind that if by "online" you mean an Internet store program, then you should really be looking at creating your application using ASP instead of Visual Basic.  If you install the Personal Web Server (or is it Peer Web Server?) that comes with one of the NT Service packs (I think you can also get a version that runs under Windows 95 from Microsoft), you will get an HTML based tutorial called the ASP Roadmap.  The sample application that comes with that is an online outdoor equipment store that accesses an Access database.

To see if you have it, look for the InetPub directory on your computer.  If you find it, I think the roadmap is in something like:

\inetpub\wwwroot\ASPSamp   and the sample app is in

\inetpub\wwwroot\ASPSamp\ADVWorks