Copying content from hidden page

Pushing the boundaries of scripting here. I am trying to retrieve conent that is currently hidden. I can find the marker showing hidden content and through the corresponding markers I can find the content on the hidden page, but setting the text selection to the hidden page and using Doc.Copy gives an error -59 (bad selection for this operation).

Does anyone have a clue how to get to the hidden content (without making it visible - as that will cause lots of layout changes that need to be undone later).

Thanks

Jang