Create a DLL and export or use it in VB6

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i need to make a dll in vb2008 and use it like dll reference in vb6.

I was looking and i found many reference where the dll created in vb2008 must be registered.

Someone knows?

What I have tried:

I tried the register the dll and import it from vb6.

Posted 4-Sep-20 4:26am

Salomon Pineda Silva

Updated 4-Sep-20 4:37am

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F-ES Sitecore · Answer 1 · 2020-09-04T04:37:00

Solution 2

You have to make sure your .net object is COM compatible

Exposing .NET components to COM | Microsoft Docs[^]

(you might have to double-check what interfaces you need for vb6 to use it properly, it may need IDispatch, I forget), then you have to register the dll which is just how COM works, it is registry-based and the registration process creates the required registry entries, and from there you should be able to add a reference to it from VB6. Obviously the target machine will also need everything available that the .net object needs, and you need to be careful about what types you are using as parameters.

Posted 4-Sep-20 4:37am

F-ES Sitecore

Comments

Richard Deeming 4-Sep-20 10:51am

From what I've seen, you should be able to use a "registration-free" COM object from VB6.
Registration-Free COM Interop | Microsoft Docs[^]

F-ES Sitecore 4-Sep-20 11:49am

Is that not for when .net is the consumer of the COM object though?

Richard Deeming 4-Sep-20 11:53am

I think it works the other way too - for example:
com interop - vb.NET DLL Registration Free COM with VB6 - Stack Overflow[^]

F-ES Sitecore 4-Sep-20 11:59am

That's clearer, you add a manifest file to the vb exe which the underlying COM system natively knows how to process. Not sure that would work when developing a VB6 app though, it looks like something that helps you deploy the app after it has been developed such that you don't need to register your COM components.