Hi Jay,
I've got an example in the the article "Combo Box Table of Contents" located
here: http://www.visguy.com/2006/11/08/combo-box-table-of-contents/
There's code listings in the article, and a downloadable Visio file that has
a combo box on the page, and VBA code behind it.
--
Hope this helps,
Chris Roth
Visio MVP
Free Visio shapes:
http://www.visguy.com/category/shapes
Visio programming info:
http://www.visguy.com/category/programming/
Other Visio resources:
http://www.visguy.com/visio-links/