Add-in in c# to genrate popup message when clicking on U

Question

Hi All,

I developing an outlook add in VB.net in which I wand achieve the functionality given:

When user click on URL contained in an email message the add in check presence of the url in access database. Then popup a message either to continue to navigate to the URL or cancel navigation. How i can achive this. Which EventHandler to be catched.

Regards,

Asif Aziz.