Arcobjects in Python, inherit from Abstract Class

Question

As for question, I am trying to adjust Grid Map labels via Arcobjects with Python. For now I do have:

from comtypes.client import CreateObject, GetModule
import arcpy

def CType(obj, interface):
   """Casts obj to interface and returns comtypes POINTER or None"""
   try:
       newobj = obj.QueryInterface(interface)
       return newobj
   except:
       return None

def NewObj(MyClass, MyInterface):
   """Creates a new comtypes POINTER object where\n\
   MyClass is the class to be instantiated,\n\
   MyInterface is the interface to be assigned"""
   from comtypes.client import CreateObject
   try:
       ptr = CreateObject(MyClass, interface=MyInterface)
       return ptr
   except:
       return None

esriCarto = GetModule(r"C:\Program Files (x86)\ArcGIS\Desktop10.0\com\esriCarto.olb")
esriCartoUI = GetModule(r"C:\Program Files (x86)\ArcGIS\Desktop10.0\com\esriCartoUI.olb")
esriMapUI = GetModule(r"C:\Program Files (x86)\ArcGIS\Desktop10.0\com\esriArcMapUI.olb")
esriFrame = GetModule(r"C:\Program Files (x86)\ArcGIS\Desktop10.0\com\esriFramework.olb")

arcpy.SetProduct('Arcinfo')

pApp = NewObj(esriFrame.AppROT, esriFrame.IAppROT).Item(0)
pDoc = pApp.Document
pMxDoc = CType(pDoc, esriMapUI.IMxDocument)
pLayout = pMxDoc.PageLayout
pGraphContLayout = CType(pLayout, esriCarto.IGraphicsContainer)
iFrameElement = pGraphContLayout.FindFrame(pMxDoc.ActiveView.FocusMap)

As far as I understand, iFrameElement is an interface of an abstract class from which I need to inherit attributes (pointer) to MapFrame object. How do I do that? How do it get to object with IMapGrids interface. Any suggestions?

Answer 1

I did ask this question also at SO site (question at SO). Code sample is below:

pGraphContLayout = CType(pLayout, esriCarto.IGraphicsContainer)
pFrame = pGraphContLayout.FindFrame(pMxDoc.ActiveView.FocusMap)
pGrids = CType(pFrame, IMapGrids)