Sub EraseFeatureLayer()
  Dim pMxDoc As IMxDocument
  Dim pMap As IMap
  Dim pFeatureLayer As IFeatureLayer
  Dim pInFeatureClass As IFeatureClass
  Dim pOutFeatureClass As IFeatureClass
  
  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 dFuzzyTol As Double
  Dim pEraseLayer As IFeatureLayer
  Dim pEraseFeatureClass As IFeatureClass
  'an exaple on how to get a feature layer by name
  Set pEraseLayer = ET.GetLayer("erase_layer")
  If pEraseLayer Is Nothing Then
    Exit Sub
  End If
  Set pEraseFeatureClass = pEraseLayer.FeatureClass
  dFuzzyTol = 0.002
  sOutFileName = "c:\00\erase.shp"
  Set pOutFeatureClass = ET.EraseIt(pInFeatureClass, pEraseFeatureClass, _
                                sOutFileName, dFuzzyTol)
  '========================================================================
  Set pFeatureLayer = New FeatureLayer
  Set pFeatureLayer.FeatureClass = pOutFeatureClass
  pFeatureLayer.Name = pOutFeatureClass.AliasName
  pMap.AddLayer pFeatureLayer
End Sub