Using VB4DLL.TXT File to Develop DLLs for Visual Basic

ID: Q150705

The information in this article applies to:

Microsoft Visual Basic Standard, Professional, and Enterprise Editions, 16-bit and 32-bit, for Windows, version 4.0

SUMMARY

This article describes the file, Vb4dll.txt, that contains information about developing 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 is available for downloading as a self-extracting file through the Microsoft Software Library.

Following is the Table of Contents for this file:

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

MORE INFORMATION

The following file is available for download from the Microsoft Download Center. Click the file name below to download the file:

Vb4dll.exe

For more information about how to download files from the Microsoft Download Center, please visit the Download Center at the following Web address

http://www.microsoft.com/downloads/search.asp

and then click How to use the Microsoft Download Center.

REFERENCES

As a companion to this document, please click the article number below to view the article in the Microsoft Knowledge Base:

Q196976 INFO: Updated VB4dll.txt for Visual Basic 4.0

Additional query words:

Keywords : kbfile kbVBp400
Version : WINDOWS:4.0
Platform : WINDOWS
Issue type :