How can I disable the display of tab page headings so that
the user cannot click on them to change tab page. Instead I
want to force a user to click on a 'previous' or 'Next'
button in order to navigate through my tab page collection.

I found a work-around that I'm not particularly proud of but it works. Set the Text property on each page to nothing. Set the SizeMode property on the tab control to Fixed, then set the ItemSize to 1 x 1. Technically the headings are there, but they are only occupying one pixel each so you'd need pretty good eyesight to see them. (Or is it just that I have particular bad eyesight :-)

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