Microsoft KB Archive/940737

= FIX: A .NET Framework 1.1 application that uses the AxHost class to host ActiveX controls crashes or throws exceptions =

Article ID: 940737

Article Last Modified on 8/17/2007

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APPLIES TO


 * Microsoft .NET Framework 1.1

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SYMPTOMS
If an application uses the AxHost class to host ActiveX controls in the Winforms.dll file, the Terminate events of the ActiveX controls do not occur immediately. When the Terminate events do not occur, a leak occurs in unmanaged resources, such as Graphics Device Interface (GDI) objects. When this issue occurs, the application crashes or throws exceptions.



CAUSE
This issue occurs because the Axhost class in the .NET Framework 1.1 does not release the COM object correctly.



Hotfix Information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 1.1 service pack that contains this hotfix.

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

http://support.microsoft.com/contactus/?ws=support

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.

Prerequisites
This hotfix requires the Microsoft .NET Framework 1.1 Service Pack 1 to be installed on the computer.

885055 How to obtain Microsoft .NET Framework 1.1 Service Pack 1

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about the AxHost class, visit the following Web site:

http://msdn2.microsoft.com/en-us/library/system.windows.forms.axhost(vs.71).aspx

Additional query words: AxHost ReleaseCOMObject OCX leak

Keywords: kbexpertiseinter kbhotfixserver kbqfe KB940737

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