パスが切れたデータ ソースの取得

Sub GetOriginalPath()
    'ThisDocumentの取得
    Dim pMxDocument As IMxDocument
    Set pMxDocument = ThisDocument
     
    'アクティブなデータフレームの取得
    Dim pMap As IMap
    Set pMap = pMxDocument.FocusMap
     
    '最上位レイヤの取得
    Dim pLayer As IDataLayer
    Set pLayer = pMap.Layer(0)
     
    Dim pDatasetName As IDatasetName
    Set pDatasetName = pLayer.DataSourceName
 
    Debug.Print pDatasetName.WorkspaceName.PathName
End Sub