Hi, i am a student doing a project on programming a PDA using VB.net to set up a bluetooth communication with a laptop

I am new to Visual Basic.Net, and really needs help in the programming part, as i am losing time in my project..

My main objectives is for 1 laptop and 1 PDA to set up a bluetooth communication to detect one another. Once the laptop is shutdown or out of range, the PDA should sound a buzzer to alert the PDA user.

I am told to do 2 programming (1 for PDA , 1 for the laptop)
Can someone pls help guide me on how i should start? I will appreciate your help very much!!