選択セットの OID を取得

Public Sub ShowSelectedFeatures()
    'IFeatureLayerにキャスト
    Dim pFeatureLayer As IFeatureLayer
    Set pFeatureLayer = pLayer
    
    'FeatureClassの取得
    Dim pFeatureClass As IFeatureClass
    Set pFeatureClass = pFeatureLayer.FeatureClass
    
    Dim pFeature As IFeature
    
    'フィーチャ選択機能にアクセス
    Dim pFeatureSelection As IFeatureSelection
    Set pFeatureSelection = pLayer  'QI(フィーチャ レイヤ)
    
    'SelectionSetオブジェクトの取得
    Dim pSelectionSet As ISelectionSet
    Set pSelectionSet = pFeatureSelection.SelectionSet
    
    '選択フィーチャのObjectID群を取得
    Dim pEnumIDs As IEnumIDs
    Set pEnumIDs = pSelectionSet.IDs
    
    pEnumIDs.Reset
    
    Dim lngID As Long
    lngID = pEnumIDs.Next
    
    Do Until lngID = -1
        Set pFeature = pFeatureClass.GetFeature(lngID)
        MsgBox pFeature.Fields.Field(2).Name & ":" & pFeature.Value(2)    'フィールド インデックス 2 を表示
        
        lngID = pEnumIDs.Next
    Loop

End Sub