Article ID: 150705 - Last Review: March 15, 2005 - Revision: 4.2

Using VB4DLL.TXT File to Develop DLLs for Visual Basic

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This article was previously published under Q150705

SUMMARY

This article describes the file, Vb4dll.txt, that contains information about developing dynamic-link libraries (DLLs) for use with Visual Basic. This file ships with all editions of Visual Basic and is installed in the main Visual Basic directory. This file is also included in Vb4dll.exe, which you can download as a self-extracting file from the Microsoft Download Center.

This file includes the following table of contents:

Calling Conventions
16/32-bit Issues
Passing and Returning Common Built-in Types
Passing and Returning Strings
Passing and Returning User-Defined Types
Passing and Returning Objects
Passing and Returning Arrays
Manipulating Variants
Passing Unicode Strings
Creating a Type Library
Compiling a 32-bit Unicode DLL
Creating a TypeLib For All The Functions In This Document
Additional Resources

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MORE INFORMATION

The following file is available for download from the Microsoft Download Center:

Vb4dll.exe (http://download.microsoft.com/download/vb40ent/utility/1/w9xnt4/en-us/vb4dll.exe)

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 (http://support.microsoft.com/kb/119591/EN-US/ ) How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

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