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A COM server may not exit as expected after the object is destroyed if you start Internet Explorer 7 as the COM server

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Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
©2005-©2007 Microsoft Corporation. All rights reserved. Terms of Use | Trademarks
Article ID: 950935 - Last Review: April 17, 2008 - Revision: 1.0

A COM server may not exit as expected after the object is destroyed if you start Internet Explorer 7 as the COM server

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SYMPTOMS

If you start Windows Internet Explorer 7 as a Microsoft COM server, the COM server may not exit as expected after the object is destroyed.

Consider the following scenario in Microsoft Internet Explorer 6. You start Internet Explorer 6 as a COM server by using the CoCreateInstance method. Additionally, you do not call the IWebBrowser2::put_Visible(VARIANT_TRUE) method to make the window visible. In this scenario, the final Release method that is performed on the client-side interface pointer stops the Internet Explorer process. This behavior occurs because Internet Explorer 6 implements the IExternalConnection interface in COM.

However, in Internet Explorer 7, the COM server does not exit after the interface pointer is released. This problem is a side effect of the new threading architecture for Internet Explorer 7. In the new threading architecture for Internet Explorer 7, each tab has its own thread.
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WORKAROUND

To work around this problem, call the IWebBrowser2::Quit method to stop the Internet Explorer server process.

Note You can use this technique to work around this problem in Internet Explorer 7 and in Internet Explorer 6.
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REFERENCES

For more information about the IWebBrowser2::Quit method, visit the following Microsoft Developer Network (MSDN) Web site:
http://msdn2.microsoft.com/en-us/library/aa752140.aspx (http://msdn2.microsoft.com/en-us/library/aa752140.aspx)
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APPLIES TO
  • Windows Internet Explorer 7
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Keywords: 
kbexpertiseadvanced kbtshoot kbprb KB950935
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