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From: Martin Krischik <krischik@users.sourceforge.net>
Newsgroups: comp.lang.ada
Subject: Re: Q re how to do pointer access in Ada (newbie)
Date: Mon, 26 Nov 2007 10:17:27 +0100
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Date: 2007-11-26T10:17:27+01:00
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axtens schrieb:
> G'day everyone!
> 
> In my current DLL project, I'm passing from VB6 to the Ada DLL a
> variety of addresses: VARPTRs to LONG, to DOUBLE, to a TYPE which is
> two LONGs, and a TYPE which is two DOUBLEs. Assuming these arrive in
> to an Ada function with a parameter defined as Win32.LONG, what would
> be the best way of converting that LONG to something which can be used
> to extract the data to which it points?

You are aware that passing pointer as Win32.LONG might not work on
Windows 64?

Now, I would not pass the parameter as a "pointer" at all. I would use
"in", "out", "in out" and maybe "access" whatever is appropiate.

Suggested Reading:

http://en.wikibooks.org/wiki/Ada_Programming/Types/access#C_compatible_pointer

Martin
-- 
mailto://krischik@users.sourceforge.net
Ada programming at: http://ada.krischik.com