Map を新規に作成する方法

'Mapクラスのインスタンスを作成するだけでは、データフレームのプロパティが表示されず、レイアウト ビューにも追加されない。Developer Helpのサンプルに記載の操作が必要。
 
'IMap Interface Example
Public Sub AddDataFrame()
  
  Dim pContentsView As IContentsView
  Dim pApp As IMxApplication
  Dim pMap As IMap
  Dim pMaps As IMaps
  Dim pMxDocument As IMxDocument
  Dim pActiveView As IActiveView
   
  Set pApp = Application
  Set pMxDocument = ThisDocument
  Set pActiveView = pMxDocument.ActiveView
  Set pMaps = pMxDocument.Maps
  Set pMap = pMaps.Create
   
  pMaps.Add pMap
  
  Set pContentsView = pMxDocument.CurrentContentsView
  pContentsView.Refresh pMxDocument
  
  Dim pMapFrame As IMapFrame
  Dim pMapExt As IEnvelope
   
  Set pMapFrame = New MapFrame
  Set pMapExt = New Envelope
  Set pMapFrame.Map = pMap
   
  pMapExt.XMin = 3
  pMapExt.YMin = 3
  pMapExt.XMax = 7
  pMapExt.YMax = 7
   
  Dim pMapElement As IElement
  Dim pGeoExt As IGeometry
   
  Set pMapElement = pMapFrame
  Set pGeoExt = pMapExt
  pMapElement.Geometry = pGeoExt
   
  If pActiveView.IsMapActivated Then
    Set pMxDocument.ActiveView = pMap
    Dim pGraphicsContainer As IGraphicsContainer
    Set pGraphicsContainer = pMxDocument.PageLayout
    pGraphicsContainer.AddElement pMapElement, 2
  Else
    pActiveView.GraphicsContainer.AddElement pMapElement, 2
    pMapElement.Activate pApp.Display
  End If
  pActiveView.Refresh
   
End Sub