You can't fully quit Outlook when you use a COM Add-in in Outlook 2002

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Article ID: 294867 - View products that this article applies to.
This article was previously published under Q294867
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For a Microsoft Outlook 2000 version of this article, see 208332.


You create an Outlook COM Add-in, but Outlook does not fully quit when you click Exit on the File menu.


This typically happens when you use an Explorer or Inspector object variable and it is not properly released by the COM Add-in.

When the OnBeginShutdown event fires in the COM Add-in, the forms (Inspectors) and folder windows (Explorers) have already been closed. Therefore it is impossible to set these objects to Nothing using the COM Add-in's OnDisconnect or OnBeginShutdown events, since the object variables are no longer valid, and will generate errors if used.


Implement the Close event for the Explorer or Inspector object, and then set the corresponding object variable to Nothing at the end of that event.

Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs.
If you have limited programming experience, you may want to contact a Microsoft Certified Partner or Microsoft Advisory Services. For more information, visit these Microsoft Web sites:

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For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:;EN-US;CNTACTMS The following code segment illustrates how you can declare an Explorer object WithEvents and implement the corresponding Close event that will fire just before the Explorer window closes.
Public WithEvents oMyExplorer As Outlook.Explorer

Sub oMyExplorer_Close()
    ' Release the Explorer object 
    Set oMyExplorer = Nothing
End Sub


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.


For additional information about available resources and answersto commonly asked questions about Microsoft Outlook solutions, click the article number below to view the article in the Microsoft Knowledge Base:
287530 OL2002: Questions About Custom Forms and Outlook Solutions


Article ID: 294867 - Last Review: November 23, 2006 - Revision: 3.4
  • Microsoft Outlook 2002 Standard Edition
kbaddin kbnewfile kbprb KB294867

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