Have a read of the user guide doc (either in the release or at http://www.alanjmcf.me.uk/comms/bluetooth/32feet.NET%20—%20User’s%20Guide.html) From it:
"Of course one can discover and select the peer device at runtime, either discovering the devices and selecting one in code, or displaying the UI device selection dialog. One would use code like the following, respectively.
Dim cli As New BluetoothClient
Dim peers() As BluetoothDeviceInfo = cli.DiscoverDevices()
Dim device As BluetoothDeviceInfo = ... select one of peer()...
Dim addr As BluetoothAddress = device.DeviceAddress
...
"