Sub PointToMultipoint()
  Dim pMxDoc As IMxDocument
  Dim pMap As IMap
  Dim pFeatureLayer As IFeatureLayer
  Dim pInFeatureClass As IFeatureClass
  Dim pOutFeatureClass As IFeatureClass
  Dim sMessage As String
  Set pMxDoc = ThisDocument
  Set pMap = pMxDoc.FocusMap
  Set pFeatureLayer = pMxDoc.SelectedLayer
  Set pInFeatureClass = pFeatureLayer.FeatureClass
  '=======================================================================
  Dim ET As New ETGW_Core
  Dim sOutFileName As String
  Dim sIdFieldName As String
  sIdFieldName = "ET_IDP"
  sOutFileName = "c:\00\multipoint1.shp"
  Set pOutFeatureClass = ET.PointToMultipoint(pInFeatureClass, sOutFileName, _
                                        sIdFieldName, sMessage)
  '========================================================================
  If pOutFeatureClass Is Nothing Then
    MsgBox sMessage
  Else
    Set pFeatureLayer = New FeatureLayer
    Set pFeatureLayer.FeatureClass = pOutFeatureClass
    pFeatureLayer.Name = pOutFeatureClass.AliasName
    pMap.AddLayer pFeatureLayer
  End If
End Sub