Microsoft KB Archive/935200

= Error message when an application calls the RegisterTypeLib API to register a type library in Windows Vista: &quot;Access denied&quot; =

Article ID: 935200

Article Last Modified on 11/30/2007

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APPLIES TO


 * Microsoft COM+ 2.0 Standard Edition
 * Windows Vista Enterprise
 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Ultimate
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Home Premium
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Home Basic
 * Windows Vista Home Basic 64-bit Edition

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SYMPTOMS
Consider the following scenario. In an application that is running on a Windows Vista-based computer, you try to map the  registry subtree to another registry subtree. For example, you try to map the  registry subtree to the   registry subtree. When the application calls the RegisterTypeLib API to register a type library, you may receive the following error message:

Access denied

Additionally, the RegisterTypeLib API returns the TYPE_E_REGISTRYACCESS (0x8002801c) value.

This problem occurs if User Account Control (UAC) is enabled, and the application is running under the Limited User Account.



RESOLUTION
After you install this hotfix that is described in this article, you must enable the hotfix. See the &quot;Enable the hotfix&quot; section for more information.

Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might 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, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites
You must have Windows Vista installed to apply this hotfix.

Restart requirement
You must 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.

Windows Vista, 64-bit versions


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



Enable the hotfix
After you install this hotfix, you must use one of the following methods to enable the hotfix.

Method 1
This hotfix adds a new API. Before the application calls the RegisterTypeLib API, the application can call the void OaEnablePerUserTLibRegistration function to enable the RegisterTypeLIb API to use the appropriate override mapping. The OaEnablePerUserTLibRegistration function is exported from the Oleaut32.dll file. You must reference this file by using Run-Time Dynamic Linking and by using the GetProcAddress function. For more information about the GetProcAddress function and about Run-Time Dynamic Linking, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/ms686944.aspx

Method 2
After you install the hotfix, the RegisterTypeLib API will check the OAPERUSERTLIBREG environment variable. If the value of the OAPERUSERTLIBREG variable is 1, the RegisterTypeLIb API will use the appropriate override mapping. Because this environment variable is read during the initialization of the DLLMain function, you must set this environment variable before you run the application. To do this, run one of the following commands at a command prompt:
 * set OAPERUSERTLIBREG=1
 * start cmd.exe /c &quot;set OAPERUSERTLIBREG=1 && &quot;

Note The  placeholder points to the application that you want to run.

Note The first command only sets the environment variable. The second command sets the environment variable and then runs the application. If you use the first command, you must also run the application at this command prompt.



For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

