Private Sub LabelLayer(pFeatureLayer As IFeatureLayer, _
blnLabel As Boolean)
    ' Label a layer by turining on
    ' the label property.
    Dim pGeoFeatureLayer As IGeoFeatureLayer
    Dim pMxDocument As IMxDocument
    Dim pMap As IMap
    Dim pActiveView As IActiveView
    Set pMxDocument = Application.Document
    Set pMap = pMxDocument.FocusMap
    Set pActiveView = pMap
    ' Turn on or off the layer's labeling.
    Set pGeoFeatureLayer = pFeatureLayer
    pGeoFeatureLayer.DisplayField = "NAME"
    pGeoFeatureLayer.DisplayAnnotation = blnLabel
    pActiveView.Refresh
End Sub