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Information about using Visual Basic 6.0 on 64-bit Windows operating systems

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Note Microsoft Visual Basic 6.0 has reached the end of assisted support in its life cycle. For more information about the support life cycle, visit the following Microsoft Web site: (

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The Visual Basic 6.0 family of products are designed to run on 32-bit versions of Microsoft Windows operating systems. When you run any of these programs on a 64-bit version of a Windows operating system, the program runs in the 32-bit layer of the Windows operating system known as Windows on Windows (WOW).

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More information

Microsoft developed Visual Basic 6.0 before the availability of the IA-64 and x64 operating systems. Because 32-bit applications run transparently in WOW, the experience should be identical to running on a native 32-bit operating system. Although Visual Basic 6.0 should run without any issues in 64-bit environments, you may experience unexpected behavior in rare instances.

You may experience an issue when you run a program that was created in a Visual Basic 6.0 product on a 64-bit version of Windows. When you obtain support for this issue, you should note whether the issue also occurs when you run the program on the equivalent 32-bit version of the same version of Windows.

Because 32-bit applications run in WOW, you should experience a negligible difference between 32-bit and 64-bit environments.

For more information about how to run 32-bit applications in a 64-bit environment, visit the following Microsoft Developer Network (MSDN) Web site:

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Keywords: KB894373, kbinfo

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Article Info
Article ID : 894373
Revision : 4
Created on : 10/11/2007
Published on : 10/11/2007
Exists online : False
Views : 348