C:\perlmonks747643>ls -lh
total 12K
-rw-rw-rw-  1 666 0 126 2009-03-03 01:31 myTest.cpp
-rw-rw-rw-  1 666 0  49 2009-03-03 01:30 myTest.h
-rw-rw-rw-  1 666 0 248 2009-03-03 01:35 myTest.pl

C:\perlmonks747643>cat myTest.h
extern "C" __declspec(dllexport) int test(int);

C:\perlmonks747643>cat myTest.cpp

#include "myTest.h"




extern "C" __declspec(dllexport) int __stdcall test(int x) {
    x *= 2;
    return x;
}


C:\perlmonks747643>cat myTest.pl
#!/usr/bin/perl --

use strict;
use warnings;
use Win32::API;
use Win32::API::Callback;
use Win32::API::Test;
my $fun = Win32::API->new('myTest.dll', 'int test(int a)') or die $^E;
my $Result = $fun->Call(12);
print "12 * 2 = $Result\n";

C:\perlmonks747643>gcc -shared -o myTest.dll myTest.cpp -Wl,--add-stdcall-alias

C:\perlmonks747643>ls -lh
total 28K
-rw-rw-rw-  1 666 0 126 2009-03-03 01:31 myTest.cpp
-rw-rw-rw-  1 666 0 13K 2009-03-03 01:36 myTest.dll
-rw-rw-rw-  1 666 0  49 2009-03-03 01:30 myTest.h
-rw-rw-rw-  1 666 0 248 2009-03-03 01:35 myTest.pl

C:\perlmonks747643>perl myTest.pl
12 * 2 = 24

C:\perlmonks747643>pexports -v myTest.dll
;    .text: RVA: 00001000, File offset: 00000400
;    .data: RVA: 00002000, File offset: 00000c00
;   .rdata: RVA: 00003000, File offset: 00000e00
;     .bss: RVA: 00004000, File offset: 00000000
;   .edata: RVA: 00005000, File offset: 00001000
; Reading exports from section: .edata
; Export table: myTest.dll
; Ordinal base: 1
; Ordinal table RVA: 00005038
; Name table RVA: 00005030
; Export address table RVA: 00005028
LIBRARY myTest.dll
EXPORTS
test ; .text ; RVA 00001180
test@4 ; .text ; RVA 00001180
;   .idata: RVA: 00006000, File offset: 00001200
;   .reloc: RVA: 00007000, File offset: 00001400

C:\perlmonks747643>