MSG opened in Windows Explorer is added to Inbox

[John Steer]

We have a COM Add-In for Outlook. It adds toolbars to Outlook's explorer and
inspector dialogs. When an inspector dialog is opened we add it to a
collection of inspectors in the add-in.

When the user opens a saved email item (XXX.MSG) by double-clicking it on,
say, the desktop, Outlook adds a new instance of that email item to the
user's inbox. Repeatedly opening the saved item adds a new instance each
time. There is no code in the add-in to add the item to the inbox.

The add-in has a NewInspector event handler and an Inspector_Activate event
handler. But is is AFTER the latter that Outlook adds a new email instance
into the Inbox. We know that Excel changes how it handles some events when
the developer handles the same events, does Outlook do the same?

Does anyone know how we can prevent these additional instances?

Thanks...

 

[Roady [MVP]]

You'd probably get an answer faster if you post in the developer newsgroups
down the hall.

 

[John Steer]

Thanks. I'm new to this process and feeling my way around. I did put it in
another category and did get more code based help.

Jef.