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From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: How to get the mouse position with JEWL?
Date: Thu, 21 Oct 2010 19:10:37 +0000 (UTC)
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Date: 2010-10-21T19:10:37+00:00
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> Surely it is better to use it from win32ada than making own binding.
There are several reasons:
1. The program that polled for mouse position is a console mode
program, not an event driven Windows program (which of course would
have watched for a WM_MOUSEMOVE event instead).  The call to GetCursorPos
is the only inported function it uses, so win32ada would be overkill.
2. The win32ada I have is dated 2002.  Much of my Windows code predates
that (it uses CLAW) so I never started using win32ada.
3. My copy of win32.ads declares
  subtype PVOID is System.Address;
System.Address is not the same as an access value to my preferred Ada
compiler.
4. I also note that my copy of win32-windef.ads says, in the private part,
  pragma Convention(C_Pass_By_Copy, POINT);
which would of course make Jeffrey Carter's suggestion fail.  The
possibility of surprises like that makes me leary.