Below code will give me System double means in m^3 example : 3.65249415887984E-06
sm=ExtAPI.SelectionManager
b=sm.CurrentSelection.Ids
c=ExtAPI.DataModel.GeoData.GeoEntityById(body)
d=c.Volume.GetType()
d
Below code will give me double means example : '0 [mm mm mm]'
geometry = ExtAPI.DataModel.Project.Model.Geometry
listPart = geometry.GetChildren(DataModelObjectCategory.Part,True)
b=part.Volume.GetType()
b