Attempting to add new explorer event handler (outlook) causes exception

From: Graham (anonymous_at_discussions.microsoft.com)
Date: 03/13/04 

Date: Fri, 12 Mar 2004 23:36:07 -0800

Hi,

A simple C# Addin,

When invoking

m_outlookapp.Explorers.NewExplorer += new Outlook.ExplorersEvents_NewExplorerEventHandler(newExplorer);

newExplorer is defined as

private void newExplorer(Outlook.Explorer explorer)
{
   // .. do something
}

I am getting the following exception:

  System.Exception {"No such interface supported" } System.Exception
       System.Object {System.InvalidCastException} System.Object

at System.Runtime.InteropServices.UCOMIConnectionPoint.Advise(Object pUnkSink, Int32& pdwCookie)
   at Outlook.ExplorersEvents_EventProvider.add_NewExplorer(ExplorersEvents_NewExplorerEventHandler )
   at Outlook.ExplorersClass.add_NewExplorer(ExplorersEvents_NewExplorerEventHandler )
   at findAddin.Connect.OnStartupComplete(Array& custom)

This is on windows 2000 professional, office 2003, vstudio dev env is 7.0.9466, .Net Framework is 1.0

I am using Outlook and Office 11.0 Object library references. I am not using the XP PIA (primary interop assemblies)

Any help would be most gratefully received,

- graham

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