True length of sweep feature

Sub TrueSweepLength()
    'Set a reference to the active part document
    Dim oDoc As PartDocument
    Set oDoc = ThisApplication.ActiveDocument
    
    Dim oDef As PartComponentDefinition
    Set oDef = oDoc.ComponentDefinition
    
    ' Check to make sure a sweep feature is selected.
    If Not TypeOf oDoc.SelectSet.Item(1) Is SweepFeature Then
        MsgBox "A sweep feature must be selected."
        Exit Sub
    End If

    ' Set a reference to the selected feature.
    Dim oSweep As SweepFeature
    Set oSweep = oDoc.SelectSet.Item(1)
    
    ' Get the centroid of the sweep profile in sketch space
    Dim oProfileOrigin As Point2d
    Set oProfileOrigin = oSweep.Profile.RegionProperties.Centroid
    
    ' Transform the centroid from sketch space to model space
    Dim oProfileOrigin3D As Point
    Set oProfileOrigin3D = oSweep.Profile.Parent.SketchToModelSpace(oProfileOrigin)
    
    ' Get the set of curves that represent the true path of the sweep
    Dim oCurves As ObjectsEnumerator
    Set oCurves = oDef.Features.SweepFeatures.GetTruePath(oSweep.Path, oProfileOrigin3D)
    
    Dim TotalLength As Double
    TotalLength = 0
    
    Dim oCurve As Object
    For Each oCurve In oCurves
        
        Dim oCurveEval As CurveEvaluator
        Set oCurveEval = oCurve.Evaluator
        
        Dim MinParam As Double
        Dim MaxParam As Double
        Dim Length As Double
        
        Call oCurveEval.GetParamExtents(MinParam, MaxParam)
        Call oCurveEval.GetLengthAtParam(MinParam, MaxParam, Length)
        
        TotalLength = TotalLength + Length
    Next
    
    ' Display total sweep length
    MsgBox "Total sweep length = " & ThisApplication.UnitsOfMeasure.GetStringFromValue(TotalLength, kInchLengthUnits)
End Sub