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From:	PositivePi AT aol DOT com
Message-ID:	<9cf0cd1e.24c153a7@aol.com>
Date:	Fri, 16 Jul 1999 23:33:59 EDT
Subject:	@at and a/w notations
To:	cygwin AT sourceware DOT cygnus DOT com
MIME-Version:	1.0
X-Mailer:	AOL 4.0 for Windows 95 sub 3

Hi..

  This is probably something that I'm supposed to know, but... What is the 
purpose of the @at and A/W notations in function names in .def's?
  For example, wsock32.def:
EXPORTS
EnumProtocolsA AT 12
EnumProtocolsW AT 12
GetAddressByNameA AT 40
GetAddressByNameW AT 40
GetNameByTypeA AT 12
GetNameByTypeW AT 12
-snip-
1) What does the @12 do?  If you remove it and create a new library without 
it, it will not link.  What adds this notation?  I don't see anything in the 
Windows32/Sockets.h header file that would change socket to socket AT 12.  Also, 
if I'm creating my own .def's, how do I figure out what the value to put 
after the @ is?
2) Why do some functions (but not all) have a pair with the A and W suffixes, 
even though theres only one function?  What adds this?  If I'm writing my own 
.def's, how do I know which functions need this?

I realize this is probably a newbie question, but I can't find a FAQ that 
mentions anything about it.. =\

Aaron

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