The Dllhost.exe process crashes if you pass by value a user-defined type that contains a BSTR type

The Dllhost.exe process crashes if the following conditions are true:

• A Microsoft COM+ component has a method with user-defined type as a parameter and the parameter is being passed by value.
• The user-defined type contains a SAFEARRAY type that contains BSTR types.
• The COM+ Hotfix Rollup Package 22 has been installed. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
  328924  (http://support.microsoft.com/kb/328924/ ) Availability of the Windows 2000 Post-Service Pack 3 COM+ Hotfix Rollup Package 22

When these conditions exist, an access violation may occur when this COM+ component method is called, and the Dllhost.exe process dies.

How to obtain the hotfix

This issue is fixed in the Windows 2000 Server COM+ 1.0 Hotfix Package 28. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section of this article.