I think you are looking for the "ExtentDirection" property. As an example run the following iLogic rule. Select the Contour Flange feature. And check that it's changing.
Dim f As ContourFlangeFeature = ThisApplication.CommandManager.Pick(SelectionFilterEnum.kPartFeatureFilter, "")
If (f.Definition.ExtentDirection = PartFeatureExtentDirectionEnum.kNegativeExtentDirection) Then
f.Definition.ExtentDirection = PartFeatureExtentDirectionEnum.kPositiveExtentDirection
Else
f.Definition.ExtentDirection = PartFeatureExtentDirectionEnum.kNegativeExtentDirection
End If
Jelte de Jong
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