Tag Archive for 'outlook'

Found this over on Noam Lampert’s blog, originally form monologue.

I remember running into this bug when writing a rather trivial outlook add-in that registered a toolbar on all new explorers. At the time I was so far under time pressure that I just caved and changed the toolbar installer to install it on all toolbars by default (worked around the bug). I didn’t think that it might be a garbage collection issue. Good spot by Noam and co.

Short version: Any new explorer callbacks will get garbage collected unless you actually create an explicit reference to the Application.Explorers that you manage in your add-in.

So you would replace this:

Application.Explorers.NewExplorer += new ExplorersEvents_NewExplorerEventHandler(Explorers_NewExplorer);

with this:

Explorers explorers = Application.Explorers;

explorers.NewExplorer += new ExplorersEvents_NewExplorerEventHandler(Explorers_NewExplorer);