全体表示コマンドの全体範囲を指定する方法

Sub setFullExtent()
    Dim pMxDocument As IMxDocument
    Set pMxDocument = ThisDocument
    
    Dim pMap As IMap
    Set pMap = pMxDocument.FocusMap
    
    Dim pActiveView As IActiveView
    Set pActiveView = pMap
    
    Dim pFeatureLayer As IFeatureLayer
    Set pFeatureLayer = pMap.Layer(0)
    
    Dim pFeatureClass As IFeatureClass
    Set pFeatureClass = pFeatureLayer.FeatureClass
    
    Dim pFeature As IFeature
    Set pFeature = pFeatureClass.GetFeature(1)
    
    Dim pEnvelope As IEnvelope
    Set pEnvelope = pFeature.Shape.Envelope
    
    '全体表示コマンドの全体範囲
    pMap.AreaOfInterest = Nothing   'すべてのレイヤのデータ範囲(デフォルト)
    pMap.AreaOfInterest = pEnvelope 'その他(表示範囲の指定はEnvelopeで設定)

    '現在の全体表示範囲を取得
    Dim pFullExtent As IEnvelope
    Set pFullExtent = pActiveView.FullExtent

End Sub