Get External Reference Configuration name API-solidworks 2012

[packmen]

Hi , I want to get a external reference configuration name of a derivated part and put it in a custom property. I used this code to print properties of external references..

'-------------------------------------------
'  Preconditions:
'  1. Open an assembly or part document.
'  2. Select:
'     * a component in an assembly document.
'       - or -
'     * a feature in an assembly or part document.
'       - or -
'     * Nothing in either type of document.
'
' Postconditions: Examine the Immediate window
' to see the name of the part or assembly document
' and the external references for the
' selected component, selected feature, or
' document.
'-------------------------------------------
Option Explicit
Sub main()
    Dim swApp                   As SldWorks.SldWorks
    Dim swModel                 As SldWorks.ModelDoc2
    Dim swModDocExt             As SldWorks.ModelDocExtension
    Dim swSelMgr                As SldWorks.SelectionMgr
    Dim swFeat                  As SldWorks.Feature
    Dim swComp                  As SldWorks.Component2
    Dim vModelPathName          As Variant
    Dim vComponentPathName      As Variant
    Dim vFeature                As Variant
    Dim vDataType               As Variant
    Dim vStatus                 As Variant
    Dim vRefEntity              As Variant
    Dim vFeatComp               As Variant
    Dim nConfigOpt              As Long
    Dim sConfigName             As String
    Dim nRefCount               As Long
    Dim nSelType                As Long
    Dim i                       As Long
    Set swApp = CreateObject("SldWorks.Application")
    Set swModel = swApp.ActiveDoc
    Set swSelMgr = swModel.SelectionManager
    Set swModDocExt = swModel.Extension
    nSelType = swSelMgr.GetSelectedObjectType3(1, -1)
    Select Case nSelType
        ' Selected component in an assembly document
        Case swSelCOMPONENTS
            Set swComp = swSelMgr.GetSelectedObjectsComponent3(1, -1)
            nRefCount = swComp.ListExternalFileReferencesCount
            swComp.ListExternalFileReferences2 vModelPathName, vComponentPathName, vFeature, vDataType, vStatus, vRefEntity, vFeatComp, nConfigOpt, sConfigName
 
        Set swModel = swComp.GetModelDoc2
        ' Selected feature in a part or assembly document
        Case swSelBODYFEATURES, swSelSKETCHES
            Set swFeat = swSelMgr.GetSelectedObject6(1, -1)
            nRefCount = swFeat.ListExternalFileReferencesCount
           swFeat.ListExternalFileReferences2 vModelPathName, vComponentPathName, vFeature, vDataType, vStatus, vRefEntity, vFeatComp, nConfigOpt, sConfigName
        
        ' Part document only
        Case Else
            nRefCount = swModDocExt.ListExternalFileReferencesCount
            swModDocExt.ListExternalFileReferences vModelPathName, vComponentPathName, vFeature, vDataType, vStatus, vRefEntity, vFeatComp, nConfigOpt, sConfigName
    End Select

    Debug.Print "Model name = " + swModel.GetPathName
    Debug.Print "    Reference count        = " + Str(nRefCount)
    Debug.Print ""
    For i = 0 To nRefCount - 1
        Debug.Print "    Model path + name      = " + vModelPathName(i)
        Debug.Print "    Component path + name  = " + vComponentPathName(i)
        Debug.Print "    Feature                = " + vFeature(i)
        Debug.Print "    Data type              = " + vDataType(i)
        Debug.Print "    Status                 = " + Str(vStatus(i))
        Debug.Print "    Reference entity       = " + vRefEntity(i)
        Debug.Print "    Feature component      = " + vFeatComp(i)
        Debug.Print "    Configuration option   = " & nConfigOpt
        Debug.Print "    Configuration name     = " & sConfigName
        Debug.Print " "
    Next i
End Sub

And it returns

Model name = X:\Encaixotadoras\Drop Packer\DPMK- 1200-A\Peças\90960100.SLDPRT
Reference count = 1

Model path + name = X:\_BIBLIOTECA\BASE PARTS\RODA DENTADA\RODA DENTADA ASA.SLDPRT
Component path + name = X:\_BIBLIOTECA\BASE PARTS\RODA DENTADA\RODA DENTADA ASA.SLDPRT
Feature = RODA DENTADA ASA
Data type = Corpo
Status = 3
Reference entity = Corpo de RODA DENTADA ASA
Feature component =
Configuration option = 0
Configuration name =

The configuration options = 0 means swExternalFileReferencesConfigNone

But I choose the configuration of the external reference so i thin k the correct should be
configuration options = 2 that means
swExternalFileReferencesNamedConfig

Is there a way to change the configuration options? No matter if it uses api or not.