Programming Guide

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SDL1000X Programming Guide 68
' viClose. This operation frees all system resources.
status = viClose(defaultRM)
Usbtmc_test = 0
End Function
(2)TCP/IP access code:
Write a function TCP_IP_Test.
Private Function TCP_IP_Test(ip As String) As Long
Dim outputBuffer As String * VI_FIND_BUFLEN
Dim defaultRM As Long
Dim instrsesn As Long
Dim status As Long
Dim count As Long
' First we will need to open the default resource manager.
status = viOpenDefaultRM (defaultRM)
If (status < VI_SUCCESS) Then
Debug.Print "Could not open a session to the VISA Resource
Manager!"
TCP_IP_Test = status
Exit Function
End If
' Now we will open a session via TCP/IP device
status = viOpen(defaultRM, "TCPIP0::" + ip + "::INSTR",
VI_LOAD_CONFIG, VI_NULL, instrsesn)
If (status < VI_SUCCESS) Then
Debug.Print "An error occurred opening the session"
viClose (defaultRM)
TCP_IP_Test = status
Exit Function