>I was thinking of display query results in a web browser. The data will a categorized list of part numbers and other data. The part numbers will be links.
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>I know I can used the Navigating event to trap when a link is clicked. The question is, how can I detect when a part hyperlink is clicked as opposed to some other link? Can I 'attach' anything to the link that I can test for?

You can tell just by looking at the URL passed in the events of the Navigating event (as long as you make them unique in some way).