Microsoft KB Archive/270420

= MB_SERVICE_NOTIFICATION Message Box May Not Exit the Process =

Article ID: 270420

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT 4.0 Service Pack 6
 * Microsoft Windows NT 4.0 Service Pack 6a
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition

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This article was previously published under Q270420



SYMPTOMS
If any thread in a process has displayed a message box by using the MB_SERVICE_NOTIFICATION flag and that message box is still visible, the process object will not be released even after the process exits. This problem occurs whether the process exits normally through a call to the ExitProcess function or abnormally through a call to the TerminateProcess function or as the result of an exception. However, the process object is eventually released when the message box is dismissed.

This behavior occurs in Windows NT 4.0 with Service Pack 6 (SP6) and Service Pack 6A (SP6A). With Service Pack 5 (SP5) and earlier, the process object is released immediately after the process exits, as expected.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

  Date      Time                 Size    File name     Platform -  09/13/2000  04:02p             955,328 Ntkrnlmp.exe  Intel 09/13/2000 04:02p             934,848 Ntoskrnl.exe  Intel 09/13/2000 04:03p           1,407,424 Ntkrnlmp.exe  Alpha 09/13/2000 04:03p           1,383,488 Ntoskrnl.exe  Alpha



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 with Service Pack 6 and Service Pack 6A.



MORE INFORMATION
This problem also occurs in Microsoft Windows 2000. For additional information about a fix for Windows 2000, click the article number below to view the article in the Microsoft Knowledge Base:

270610 Message Box Using MB_SERVICE_NOTIFICATION May Not Exit the Process

Additional query words: Ntkrnlmp Ntoskrnl

Keywords: kbbug kbfix kbqfe kbservice kbkernbase kbhotfixserver KB270420

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