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FIX: Incorrect methods are called when you call some COM APIs that are included in a .NET Framework 2.0-based 64-bit application

Article ID: 947148 - View products that this article applies to.

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SYMPTOMS

Consider the following scenario:

A 64-bit application that is created by using the Microsoft .NET Framework 2.0 calls some COM APIs.
The COM APIs have multiple instances of the same method.
The method uses the lcid attribute.
You use one of the following to call the COM APIs:
- The managed COM interop
- Platform Invoke (P/Invoke) code

In this scenario, incorrect methods are called.

For example, consider the following scenario:

You have a 64-bit application that uses a 64-bit version of common language runtime (CLR).
The application has two managed P/Invoke functions that have the same signature. The signature points to a single native method.
The two P/Invoke functions rely on the LCIDConversionAttribute class for localization support.
You run the application.

In this scenario, you may receive an error message that resembles the following:

System.Runtime.InteropServices.COMException (0x800706F4): A null reference pointer was passed to the stub. (Exception from HRESULT: 0x800706F4)

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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 Windows Vista or .NET Framework 2.0 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

(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

You must have one of the following installed to apply this hotfix:

Windows Vista Service Pack 1
The .NET Framework 2.0 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.