See / try Scripting Proxy Settings in IE and Firefox, http://cpansearch.perl.org/src/QJZHOU/LWP-UserAgent-ProxyAny-1.02/ProxyAny.pm 

sub get_ie_proxy {
    return "" unless $^O eq 'MSWin32';
    my %RegHash;
    eval 'use Win32::TieRegistry(Delimiter=>"/", TiedHash=>\%RegHash);
+';
    return get_ie_proxy_with_registry() if $@;
    my $iekey = $RegHash{"CUser/Software/Microsoft/Windows/CurrentVers
+ion/Internet Settings/"} or return "";
    my $ie_proxy_enable = $iekey->{"/ProxyEnable"} or return "";
    my $ie_proxy_server = $iekey->{"/ProxyServer"} or return "";
    my $ie_proxy_no = $iekey->{"/ProxyOverride"};
    $_[1]=$ie_proxy_no if defined($ie_proxy_no);
    return $ie_proxy_enable=~/1$/ ? $ie_proxy_server : "";
}

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In reply to Re: How to Detect HTTP proxy settings automatically in Windows OS? by Anonymous Monk
in thread How to Detect HTTP proxy settings automatically in Windows OS? by sam_bakki

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