"ken" wrote:

> Hello everyone,
> I'm new to visual VB and I am trying to setup communications using the
> Function ReceiveSerialData() As String example found in the help
> section of Microsoft Visual Basic 2005 Express Edition.
>
> Sample Code:
> Function ReceiveSerialData() As String
> ' Receive strings from a serial port.
> Dim returnStr As String = ""
>
> Using com2 As IO.Ports.SerialPort = _
> My.Computer.Ports.OpenSerialPort("COM2")
> Do
> Dim Incoming As String = com2.ReadLine()
> If Incoming Is Nothing Then
> Exit Do
> Else
> returnStr &= Incoming & vbCrLf
> End If
> Loop
> End Using
>
> Return returnStr
> End Function
>
> My modified code:
> Function ReceiveSerialData() As String
>
> ' Receive strings from a serial port.
> Dim returnStr As String = ""
> txtReceive.Text = returnStr
>
> Using com2 As IO.Ports.SerialPort = _
> My.Computer.Ports.OpenSerialPort("COM2")
> Do
> Incomingcapture = com2.ReadLine()
> If Incomingcapture Is Nothing Then
> Exit Do
> Else
> returnStr &= Incomingcapture & vbCrLf
> txtReceive.Text = returnStr
> End If
> Loop
> End Using
>
> Return returnStr
> End Function
>
> I have a Garmin gps attached to com2 and I can see the data using
> Hyper Terminal. My problem is, with Hyper Terminal disconnected and
> running the above code I get:
>
> System.IO.IOException was unhandled
> Message="The I/O operation has been aborted because of either a
> thread exit or an application request.
>
> I don't know what I'm doing wrong. Can someone explain how I can view
> the data coming from the gps or better yet if anyone can post working
> code to do this I would be very much appreciative.
>
> Thank you in advance for any and all help.
> Best regards,
> Ken