Interchangeable Code Library for VB6.0 and VB .Net

Posted on 2006-11-20
Last Modified: 2012-05-05
I have an application that is currently written in VB 6. It is due for a groud up re-write but at the moment I am having to add functionality still in 6. I have other applications that work in conjunction with it and I want to create a shared code library. This would be OK if the other applications were developed using 6 but I am having to use .Net. Is it possible to create a shared .Net library that I can use with 6, or failing that, can I access the classes and objects compiled within the VB 6 application file (EXE) in my .Net apps.. The reason I need to make this so difficult is because of an auto update routine for the main application that is done on very restricitve networks, therefore I cannot create installers for DLL's or make registry changes.
Question by:whittinga2
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
LVL 96

Expert Comment

by:Bob Learned
ID: 17978787
You can have a .NET assembly that can be used with VB6, and you can have a VB6 library that you can access from .NET.  It is really up to you which direction you want to take.


Author Comment

ID: 17978822
How can I use a .Net assembly in VB 6?
LVL 96

Expert Comment

by:Bob Learned
ID: 17978862
Here is a good article describing the steps:

This article explains the step by step procedure of how to use a .NET Assembly with COM Client.

The important piece is the regasm, that will register a .NET assembly in the registry for use in COM applications.


Author Comment

ID: 17978891
I presume this means that it has to be registered on each machine I want to use it on. This is the major problem and the reason why I don't think I am able to do this. The networks that the auto upgrade will be working on will not allow writing to the registry. I think that I am probably unable to do what I need to. Code duplication here I come...
LVL 96

Accepted Solution

Bob Learned earned 500 total points
ID: 17978918
Yes, you presume correctly, and that is the mess of DLL hell--when a DLL/Assembly needs to be registered before it can be used.  


Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A while ago, I was working on a Windows Forms application and I needed a special label control with reflection (glass) effect to show some titles in a stylish way. I've always enjoyed working with graphics, but it's never too clever to re-invent …
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question