Internal Routing Capabilities of USB 6212

Hi,

I am transitioning legacy NI-DAQ VB6 code written for the NI-6062E to DAQmx VB6 code which will now utilize the USB-6212.    From what I understand, the constant "ND_INT_AO_CH_1" (which is utilized in my legacy code) internally routes analog output channel 1 to the analog to digital converter.  Similiarly my understanding is the constant "ND_INT_AI_GND" internally routes analog input ground to the analog to digital converter.  I thought that I would be able to acheive a similiar result in DAQmx by utilizing the set of constants shown below (src: http://zone.ni.com/reference/en-XX/help/370466V-01/mxdevconsid/mseriesinterchan/). However, I wanted to confirm whether this approach is correct and if so, what are the appropriate contants in DAQmx that I should be utilizing in my code?  

Below is the relevant code snippet that I am rewriting.  

Public Function VoltageGet(ND_INT_AO_CH_1, Voltage As Double, Optional ResetCh As Boolean = True) As String
'// Returns the voltage measured on a given channel
    '// Configure channel for single-ended, bipolar operation
    iStatus = AI_Configure(iDevice, ND_INT_AO_CH_1, 1, 0, 0, 0)
    If iStatus <> 0 Then
        VoltageGet = "ERROR_DAQ - " & iStatus & " " & GetDAQError(iStatus)
        Exit Function
    End If
    If ResetCh Then
        '// Read in internal ground reference to dissipte any capactive charge left on the mux
        iStatus = AI_VRead(iDevice, ND_INT_AI_GND, -1, Voltage)
        If iStatus <> 0 Then
            VoltageGet = "ERROR_DAQ - " & iStatus & " " & GetDAQError(iStatus)
            Exit Function
        End If
        Delay 0.1
    End If
    '// Read in voltage of specfied channel
    iStatus = AI_VRead(iDevice, ND_INT_AO_CH_1, -1, Voltage)
    If iStatus <> 0 Then
        VoltageGet = "ERROR_DAQ - " & iStatus & " " & GetDAQError(iStatus)
        Exit Function
    End If
    VoltageGet = "PASS"
    Exit Function
End Function