We've implemented an Outlook Add-in that let you intercept Outlook objects to watch the interaction of other plugins with them. Here is the complete article: http://blog.nektra.com/main/2008/12/01/hooking-outlook-com-objects-with-deviare/ The add-in is part if Deviare hook library package that you can find here: http://nektra.com/products/deviare/download.php Best Regards, Pablo Yabo -- http://www.nektra.com