From: Mike Woodhouse <mikewoodhouse@...>
Date: 2007-08-29T22:30:03+09:00
Subject: Re: Calling VB6 dll from Ruby

On Aug 29, 2:06 pm, "lrleb...@gmail.com" <lrleb...@gmail.com> wrote:
> I am trying to use a VB6 dll created by another programmer from Ruby.
> To see what was I opened it in Visual Studio's object browser. It has
> a series of classes with their methods and properties. I want to acess
> the Load method in the SalesContract class. Here's my code (which is
> probably wrong)
>
> require 'Win32API'
> @ops = Win32API.new('SMD Client.dll','SalesContract::Load','I','P')
>
> Here's the error message I'm getting
>
> C:/Data/Projects/Smd_Ruby/testdll.rb:2:in `initialize':
> GetProcAddress: SalesContract::Load or SalesContract::LoadA
> (RuntimeError)
>         from C:/Data/Projects/Smd_Ruby/testdll.rb:2:in `new'
>         from C:/Data/Projects/Smd_Ruby/testdll.rb:2
>

I haven't tried this from Ruby, but VB6 DLLs are actually "ActiveX" or
COM DLLs, so you should probably be trying to talk to them using the
Win32OLE library.

HTH,

Mike