I3DProperties3 オブジェクトの取得

Private Function Get3DPropsFromLayer(layer As ILayer) As I3DProperties3
    Dim layerExtensions As ILayerExtensions
    Set layerExtensions = layer
    Dim i As Long
    For i = 0 To layerExtensions.ExtensionCount - 1
        
        If TypeOf layerExtensions.Extension(i) Is I3DProperties3 Then
            Set Get3DPropsFromLayer = layerExtensions.Extension(i)
            Exit For
        End If
    
    Next i
End Function

'[立ち上げ] タブ
p3DProperties2.ExtrusionExpressionString = "[P_NUM]"    '立ち上げの式または値
p3DProperties2.ExtrusionType = esriExtrusionBase        '各フィーチャのベース標高値を基準
p3DProperties2.Apply3DProperties pLayer                 '適用

pSxDocument.Scene.SceneGraph.ActiveViewer.Redraw True   '再描画