use CGI;
my $cgi = CGI->new;
my $cookie = $cgi->cookie(-name  => 'CookieName', -value => 'CookieValue' ...);

print $cgi->header( -cookie => $cookie,
                    -type    => 'text/html');
#print "just set a cookie on you<br>"
print $cgi->start_html("just set a cookie on you<br>");