Microsoft KB Archive/920285

= FIX: The va_arg function returns an incorrect value in a Visual C++ 2005 application =

Article ID: 920285

Article Last Modified on 11/22/2006

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APPLIES TO


 * Microsoft Visual Studio 2005 Express Edition
 * Microsoft Visual Studio 2005 Professional Edition
 * Microsoft Visual Studio 2005 Standard Edition
 * Microsoft Visual Studio 2005 Team Edition for Software Architects
 * Microsoft Visual Studio 2005 Team Edition for Software Developers
 * Microsoft Visual Studio 2005 Team Edition for Software Testers
 * Microsoft Visual Studio 2005 Team Foundation Server
 * Microsoft Visual Studio 2005 Team Foundation
 * Microsoft Visual Studio 2005 Team System Test Edition
 * Microsoft Visual Studio 2005 Tools for the Microsoft Office System

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SYMPTOMS
You use Microsoft Visual C++ 2005 to build an application. When you try to run the application, the va_arg function returns an incorrect value. This problem occurs if the following conditions are true:
 * The application is compiled for x64-based computers.
 * The code optimization feature of the Visual C++ compiler is enabled.



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it 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 Visual Studio 2005 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
There are no prerequisites for installing this hotfix.

Restart requirement
You do not have to restart your 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 bug in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbvs2002sp1fix kblangcpp kbcompiler kboptimization kbqfe kbhotfixserver kbfix KB920285

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