what POSGROUP in mate?

http://help.solidworks.com/2012/English/api/sldworksapi/Get_Mate_Reference_Properties_Example_VB.htm

Get Mate Reference Properties Example (VBA)

Don't understand what “POSGROUP” means.

use → boolstatus = swModelDocExt.SelectByID2("Default-<1>", "POSGROUP", 0, 0, 0, False, 0, Nothing, 0)

don't select ?

The code is

Option Explicit

Sub main()

   

    Dim swApp As SldWorks.SldWorks

    Dim swMateReference As SldWorks.MateReference

    Dim swFeature As SldWorks.feature

    Dim mateRefEntity As SldWorks.entity

    Dim swModel As SldWorks.ModelDoc2

    Dim swModelDocExt As SldWorks.ModelDocExtension

    Dim swSelMgr As SldWorks.SelectionMgr

    Dim strMateReferencename As String

    Dim nCount As Long

    Dim refEntType As Long

    Dim mateRefAlignment As Long

    Dim boolstatus As Boolean

   

    Set swApp = Application.SldWorks

    Set swModel = swApp.ActiveDoc

    Set swModelDocExt = swModel.Extension

    Set swSelMgr = swModel.SelectionManager

   

    swModel.ClearSelection2 True

    boolstatus = swModelDocExt.SelectByID2("Concentric_MateReference-<1>", "POSGROUP", 0, 0, 0, False, 0, Nothing, swSelectOptionDefault)

       

    Set swFeature = swSelMgr.GetSelectedObject5(1)

    Set swMateReference = swFeature.GetSpecificFeature2

   

    swModel.ClearSelection2 True

   

        ' Get the name of the mate reference

    strMateReferencename = swMateReference.Name

    Debug.Print strMateReferencename

       

        ' Get the number of reference entities in the mate reference

    nCount = swMateReference.ReferenceEntityCount

    Debug.Print nCount

   

        ' Get the mate reference type for the mate

        ' enity in the selected mate reference

    refEntType = swMateReference.ReferenceType(0)

    Debug.Print refEntType

   

        ' Get the mate reference alignment for the

        ' mate reference entity in the selected mate reference

    mateRefAlignment = swMateReference.ReferenceAlignment(0)

    Debug.Print mateRefAlignment

       

        ' Get the  mate reference entity in the mate reference

    Set mateRefEntity = swMateReference.ReferenceEntity(0)

   

        ' Select the entity

    mateRefEntity.Select4 False, Nothing

   

    swModel.ClearSelection2 True

   

End Sub

SolidworksApi macros