use LWP::UserAgent;
use HTTP::Request::Common;

%myhash;#i have a hash of parameters I need to post

$userAgent = LWP::UserAgent->new;
$response = $userAgent->request(POST 'http://foo.bar',
Content_Type => 'form-data',
Content => %myhash #I need to post the hash, not sure of the syntax
);