Is it possible to collect information from via span definition?
The purpose is to put a graphical representation on the manufacturing drawing.
The document object has a property called SetupParameter. SetupParrameter has a property called ViaLayerRanges. ViaLayerRanges is a collection of the document's LayerRange objects. Each LayerRange object has:
Based on what you asked, all the information you need should be available by getting these objects and reading their properties.