Add surface texture symbol to dimension

Public Sub AddSurfaceTextureSymbol()
    ' Set a reference to the drawing document.
    ' This assumes a drawing document is active.
    Dim oDrawDoc As DrawingDocument
    Set oDrawDoc = ThisApplication.ActiveDocument
    
    ' Check to make sure a linear dimension is selected.
    If Not TypeOf oDrawDoc.SelectSet.Item(1) Is LinearGeneralDimension Then
        MsgBox "A linear general dimension must be selected."
        Exit Sub
    End If
    
    ' Set a reference to the active sheet.
    Dim oActiveSheet As Sheet
    Set oActiveSheet = oDrawDoc.ActiveSheet
    
    ' Set a reference to the drawing dimension.
    ' This assumes that a linear general dimension is selected.
    Dim oLinearDim As LinearGeneralDimension
    Set oLinearDim = oDrawDoc.SelectSet.Item(1)

    ' Get the mid point of the first extension line of the dimension
    Dim oMidPoint As Object
    Set oMidPoint = oLinearDim.ExtensionLineOne.MidPoint

    ' Set a reference to the TransientGeometry object.
    Dim oTG As TransientGeometry
    Set oTG = ThisApplication.TransientGeometry

    Dim oLeaderPoints As ObjectCollection
    Set oLeaderPoints = ThisApplication.TransientObjects.CreateObjectCollection

    ' Create a few leader points.
    Call oLeaderPoints.Add(oTG.CreatePoint2d(oMidPoint.X + 10, oMidPoint.Y + 10))
    Call oLeaderPoints.Add(oTG.CreatePoint2d(oMidPoint.X + 10, oMidPoint.Y + 5))

    ' Create an intent and add to the leader points collection.
    ' This is the geometry that the symbol will attach to.
    Dim oGeometryIntent As GeometryIntent
    Set oGeometryIntent = oActiveSheet.CreateGeometryIntent(oLinearDim, oMidPoint)

    Call oLeaderPoints.Add(oGeometryIntent)

    ' Create the symbol with a leader
    Dim oSymbol As SurfaceTextureSymbol
    Set oSymbol = oActiveSheet.SurfaceTextureSymbols.Add(oLeaderPoints, _
            kMaterialRemovalRequiredSurfaceType, _
            True, _
            True, _
            True, _
            0.1, _
            , , , , , _
            kParticulateNondirectional)
End Sub