Hi, I am just starting out trying to use .net to control instruments over GPIB. I asked someone to give me a small code example to help me learn and in the code in the very top portion of code Imports NationalInstruments.Common & Imports NationalInstruments.NI488.2 are included but I keep getting an error message for both that says
"Namespace or type specified in the Imports 'NationalInstruments.Common' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases."
Also I am getting another error message from this variable:
Public GPIB As LangInt = New LangInt
The error message for this says: "type 'LangInt' is not defined." I am not sure if the person who gave me this code made a typo or not, or if this function is not supported in the xpress edition of VB 2009 that I am using. If anyone has any suggestions or ideas I would really appreciate it. Here is the code example. All it is supposed to do is send the IDN query command to a source meter and then return the value to a message box. Thanks for your help!!
Imports NationalInstruments.Common
Imports NationalInstruments.NI4882
Public Class Form1
Public GPIB As LangInt = New LangInt Public Keithley_ID As Integer
Public GPIBCard As Integer
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Ket_Channel As Integer
Ket_Channel = 26
GPIBCard = 0
Keithley_ID = GPIB.ildev(GPIBCard, Ket_Channel, 0, 10, 1, 0)
Dim Command As String
Dim Results As String = ""
Dim MaxDataToRead As Integer = 200 Command = "*IDN?"
GPIB.ilwrt(Keithley_ID, Command, Len(Command))
GPIB.ibrd(Keithley_ID, Results, MaxDataToRead) '
MsgBox(Results)
End Sub End Class
