Exporting functions from Borland C++

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2 total messages Started by Brian S. McCarthy Wed, 18 Nov 1992 14:51

#750

Author: Brian S. McCarthy
Date: Wed, 18 Nov 1992 14:51

11 lines
1004 bytes

I've written a DOS application in Borland C++, which I now want to turn into 
a DLL to link with a Visual Basic front end.

How can I get Borland C++ to "export" a function from a C++ program?  It's 
no problem as long as I stick with C, but from C++ it won't export.

Brian McCarthy                                              
United Technologies Research Center
East Hartford, Connecticut(203)727-7638
bsm@utrc.utc.com

Re: Exporting functions from Borland C++

#751

Author: John Grant
Date: Wed, 18 Nov 1992 17:34

17 lines
1136 bytes

In article <bsm.1.0@res.utc.com> bsm@res.utc.com (Brian S. McCarthy) writes:
>
>I've written a DOS application in Borland C++, which I now want to turn into 
>a DLL to link with a Visual Basic front end.
>
>How can I get Borland C++ to "export" a function from a C++ program?  It's 
>no problem as long as I stick with C, but from C++ it won't export.

	C++ mangles the names, whereas C doesn't.  See page 31-32 of
	Borland's "Programmer's Guide (3.1)" (blue/yellow/white book).
	Declare your function prototype as follows:
		extern "C" ... myfunc(...);
	This tells C++ not to mangle any references to this function.
-- 
John A. Grant						jagrant@emr1.emr.ca
Airborne Geophysics
Geological Survey of Canada, Ottawa

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