Outlook New Explorer Hook

When developing our add-in, we tried to add a callback on the creation of a new Explorer. Something like:

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

Unfortunatly, after a new explorer or two were created, our callback was no longer called by outlook.

What made this more consistent was:

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

GC.Collect();

Now, the NewExplorer callback was never called !!

The workaround: Create a global reference to the Explorers object, such as

Explorers explorers;

void Startup()

{

explorers = Application.Explorers;

explorers.NewExplorer += new ExplorersEvents_NewExplorerEventHandler(Explorers_NewExplorer);

....

}

It seems that without this reference, the Explorers object, together with my callback, were all collected by the GC.

This would be a good opportunity to thank my co-worker Arina for figuring this out.