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From: steved@pacifier.com (Steve Doiel)
Subject: Re: Ada callable from Visual Basic?
Date: 1997/10/19
Message-ID: <344a55ad.0@news.pacifier.com>#1/1
X-Deja-AN: 281815110
References: <62calr$hsk$1@tsunami.traveller.com>
Newsgroups: comp.lang.ada
Date: 1997-10-19T00:00:00+00:00
List-Id: <comp.lang.ada>


[snip]
>
>Oops, sorry.  Let me step down from my stump, and meekly ask my
>original question again:  How do I call Ada code from a Visual Basic
>GUI?
>
I'm not sure exactly how to do it with Visual Basic, but it's a trivial 
exercise to do it with Delphi and ObjectAda 7.1.  Presumably it's just as
easy to do with Visual Basic.

Using ObjectAda you can create a DLL that is callable from Delphi.  In 
ObjectAda you first create a package spec that contains everything to be 
exported by the DLL (for each DLL), and then in Delphi you create stubs that 
reference the DLL as external.

I believe you can do the same with GNAT.  As a matter of fact Pascal Obry has 
an example on his web page of how to call a GNAT DLL.  I haven't tried this 
with GNAT yet, but it took about 15 minutes to figure out how to make the 
Delphi/ObjectAda combination work the first time.

If you like, I'd be happy to email you my trivial example.

Steve Doiel
steved@pacifier.com