Help needed: Networking of PDA

Does anybody knows where I can get resources or working project that describes bluetooth's wireless conneciton from the PDA to the centre computer that contains Visual Basic interface with a database connected.

The PDA will be using AppForge & MobileVB with some GUI and the centre computer will be having Visual Basic 6 with a database connected.

I want to know how the wireless networking works and the codings required.

Any help is really helpful. Thanks in advance.

Help needed: Networking of PDA - Server Database