Popup to show length ,area volume of selected elements

Pleas any one know how make pop window that shows lenght area and volume i make a script but its not working.

001-test.dyn (51.7 KB)

@Sohail_Fazal Try this
MessageBox.dyn (16.2 KB)

Python Script for Message Box

import clr

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import TaskDialog

msgBox = TaskDialog
msgBox.Show(IN[0], IN[1][0])
OUT = "Done"
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