Microsoft KB Archive/934602

= FIX: An application may crash if it uses a .dll file that is created in Visual Basic 6.0 =

Article ID: 934602

Article Last Modified on 7/11/2007

-

APPLIES TO


 * Microsoft Visual Studio 6.0 Service Pack 6

-



SYMPTOMS
If an application uses a .dll file that is created in Visual Basic 6.0, the application may crash. This problem occurs if the following conditions are true:
 * An unhandled error occurs in the Class_Terminate event.
 * A class of the application uses a user-defined type.
 * The application creates a new instance of the class after the error in the Class_Terminate event occurs.



Hotfix information
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 Visual Studio 6.0 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

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 Microsoft Visual Studio 6.0 Service Pack 6 installed to apply this hotfix.

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.



WORKAROUND
To work around this problem, use one of the following methods.

Method 1
In the class module of the .dll file, create a fixed-size array of the user-defined type. For example, if the user-defined type is named &quot;MyUDT,&quot; use the following code to create a fixed-size array. Dim workaround(0) As MyUDT Note The placeholder  represents the name of the fixed-size array.

Method 2
In the Class_Terminate event, use appropriate code to handle the error. For example, use the On Error command to make sure that no unhandled errors occur in the Class_Terminate event.



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



MORE INFORMATION
For more information about software update terminology, 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

Keywords: kbfix kbpubtypekc kbqfe KB934602

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.