shouldn't matter with a case-insensitive file system.

It does matter.

D:\>perl -MWin32=NULL -e " warn NULL()
0 at -e line 1.

D:\>perl -Mwin32=NULL -e " warn NULL()
Undefined subroutine &main::NULL called at -e line 1.
[download]

Below i have written a C++ code for testing Test.cpp #include "Test.h"
#include <stdio.h>
class __declspec(dllexport) CDllTest
{
public:
CDllTest(){}
~CDllTest(){}
public:
void _stdcall SayHello();
};
void __stdcall CDllTest::SayHello()
{
printf("Hello C++");
}
Test.h
void _stdcall SayHello();
Perl File Test.pl
#!/usr/bin/perl -slw
use strict;
use warnings;
#use Win32::API;
#use Win32::API::Callback;
#use Win32::API::Test;
use Win32::API::Prototype;
my $fun = Win32::API->new('D:\Documents and Settings\M1009280\My Documents\Visual Studio 2005\Projects\Test\Test\Test.dll','void SayHello()') or die $^E;
print "$fun\n";
my $Result = $fun->Call();
print "$Result\n";


when the above perl script is exectued with the correct o/p
D:\strawberry\perl\bin>perl Test.pl
Win32::API::parse_prototype: WARNING unknown output parameter type 'void' at D:/ strawberry/perl/site/lib/Win32/API.pm line 312.
Hello C++
Hai

but need to forcebly exit to get the cmd prompt "perl.exe encountered a problem and needs to be close"
how do i get rid of this problem
Is the problem from perl script or C++ code?