Describes when you use a COM Add-in in Outlook, you can't fully quit Outlook. To resolve the issue, you can implement the "Close" event for the "Explorer" or "Inspector" object, and then set the variable to "Nothing" at the end of the event.

This article describes the known limitations that you may encounter when you create custom forms and programming solutions with Microsoft Outlook. Issues that are covered in this article include limitations of the object model and other limitations...

This article demonstrates how to use the Find and Restrict methods in the Microsoft Outlook object model. Both methods are used to programmatically retrieve items from a folder based on the value of Outlook fields.