[2005] Accessing Device on USB Port

[mulhearn22]

Hi,

OK, I have been doing some research into accessing devices on a USB port and it's kind of helped, but not really. From what I understand, I can use the IO.Port namespace to access a device on a USB port (usually). Let me know if this is incorrect.

First, I made a simple program that looped through the ports available. I get COM1 and COM3, but I have 4 USB ports. Where are the others?

My Code:

Dim comm As New List(Of IO.Ports.SerialPort) 'list of comm ports
        For Each PNstr As String In IO.Ports.SerialPort.GetPortNames() 'get a list of Com Port Names
            comm.Add(New IO.Ports.SerialPort) 'insert new port into list
            comm(comm.Count - 1).PortName = PNstr 'set the name
        Next

        ListBox1.DataSource = comm
        ListBox1.DisplayMember = "PortName"

TIA,
Matt