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FIX: A 64-bit .NET Framework 2.0-based application crashes when it calls the Microsoft.VisualBasic.Compatibility.VB6.Support.Format method

When you run a 64-bit .NET Framework 2.0-based application that calls the Microsoft.VisualBasic.Compatibility.VB6.Support.Format method, the application crashes.

Note The Microsoft.VisualBasic.Compatibility.VB6.Support.Format method is intended for use in upgrade scenarios and is most commonly used in applications that have been upgraded from Visual Basic 6.0.
This problem occurs because the Microsoft.VisualBasic.Compatibility.VB6.Support.Format method is not compatible with 64-bit operating systems. This is due to a bug in the component that this fix applies to.
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 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: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.


You must have the Microsoft .NET Framework 2.0 Service Pack 2 (SP2) or the Microsoft .NET Framework 3.5 Service Pack 1 (SP1) installed to apply this hotfix. Stop all relative .NET applications and then install the hotfix.

Restart requirement

You do not have to restart the computer after you install the hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes. 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.
x64 and Itanium-based version for Windows 2000, Windows 2003 and Windows XP
File nameFile versionFile sizeDateTime
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
To work around this problem, use the String.Format method instead of the Support.Format method.
The Support.Format method is intended for use in upgrade scenarios and is most commonly used in applications that have been upgraded from Visual Basic 6.

For more information about the Support.Format method, visit the following Microsoft Web site:

Article ID: 972959 - Last Review: 09/03/2009 05:04:35 - Revision: 1.1

Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5 Service Pack 1, Microsoft .NET Framework 2.0, Microsoft .NET Framework 2.0 Service Pack 2

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