How to get dom object from acrobat pdf

I am following the the document "PDF Accessibility API Reference" and following the section "Reading PDF files thru DOM Interface". There he mentions about including
AcrobatAccess.h, AcrobatAccess_i.c and IPDDom.h. Please let me know where I can find these files. Also, How can I get a dom object to start with. If you have a sample code to share, that would be great. I tried googling about these but was not very successful in getting this info.
Any help towards this is appreciated.

Hi Leonard,
I think there is something called GetCaret function mentioned in DOM interface which basically returns IPDomNode underneath caret. Also, in Accessibility side, accHitTest() function is there.
I think today when I explored our product, some body has written wrappers over accessibility apis to get some good information. Anyways thank you very much for all your replies.
One last question before I leave home:-)
I have accessibility object representing a active page (page which is visible). Now using accessibility apis, I can traverse the tree of accessbility objects that belong to/Underneath page. Now to get the same on a different invisible page, what should I do. Calling getParent at a page level accessibility object returns null? SOmething like I want an accessibility object whose children are "the all the pages of the document".

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