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From: Stephen Leake <stephen_leake@acm.org>
Newsgroups: comp.lang.ada
Subject: Re: function from dll
Date: 22 Jan 2004 18:43:07 -0500
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Date: 2004-01-22T18:43:07-05:00

Szymon Guz <alpha@skynetSMIECI.VONorg.NOJUSZpl> writes:

> Hi,
> I've got maybe a trivial question but I still can't solve the problem:
> 
> I've a dll written in C under Windows and I want to use specific
> function from that in my Ada program. For loading the library I use
> the WinApi function LoadLibrary and then I use the function
> GetProcAddress to get the Win32.Windef.FARPROC handle to the function
> that I need. I need to map the function from the dll in Ada to have
> sth like that:
> 
> <C++ CODE>
> void sth(){}
> </C++ CODE>
> 
> <ADA CODE>
> function sth() return Integer;
> </ADA CODE>

The Ada spec doesn't match the C spec; the C code does not return an
int.

> now I want to run in the ada function body the function from dll...
> well how to use the Win32.Windef.FARPROC handle ?

I've never actually done this, but you can probably define an access
to procedure type, and do an unchecked conversion from System.Address
to it.

-- 
-- Stephe