Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!think!husc6!spdcc!mirror!prism!rob
From: rob@prism.TMC.COM
Newsgroups: comp.sys.ibm.pc
Subject: Re: Mixed-language Programming
Message-ID: <206900146@prism>
Date: 14 Dec 89 15:26:00 GMT
References: <1272@amethyst.math.arizona.edu>
Lines: 23
Nf-ID: #R:amethyst.math.arizona.edu:-127200:prism:206900146:000:1157
Nf-From: prism.TMC.COM!rob    Dec 14 10:26:00 1989


>I want to link a C(Borland Turbo C) routine with a
>BASIC routine under Microsoft 3.3...

>Does the C compiler use the same calling 
>convention as the BASIC? I'm not much of an
>expert on BASIC, or is it the case that the two compilers
>use different conventions...

   There are things you need to watch out for, but it can be done without 
too much trouble. As you suspected, BASIC and C use different calling 
conventions, but many newer compilers (of both languages) let you modify 
the calling convention on a function-by-function basis, which makes it 
relatively simple for different languages to communicate.  

   The best reference I've seen on this subject is a Microsoft document 
called the 'Mixed-Language Programming Guide'. It covers everything you need
to know to make this work. Trouble is, the only way I know of getting it is 
to buy a Microsoft compiler. I don't know if Borland publishes something
similar. The Microsoft document obviously deals with Microsoft products, but
Turbo C and Microsoft C are very similar in terms of calling convention, 
segment setup, etc., so most of what you read about one should apply to the 
other.