Enumerating controls in a form or dialogue box

I have placed my own activeX control in a MFC dialogue box and using this control i want to enumerate all the controls that are
present in that dialogue box. I am able to get the IClientSite pointer but unable to get the IOleContainter interface pointer.
Does VC implements IOleContainer Interfacer?
If not give me an alternative to enumerate the items present in the form or dialogue box.