Multiversions.Revit.Sample.FloorAreaCommand D51C131A-5E50-4A2B-8F52-D8036AA7A701 Multiversions.Revit.Sample - Floor Area The description for your command goes here Multiversions.Revit.Sample.dll == Edit in project's properties == == Edit (company + authors + website) in project's properties == AlwaysVisible