function pical_search_base($mydirname, $keywords, $andor, $limit, $offset, $uid)
 {
     global $xoopsConfig, $xoopsDB, $xoopsUser;
     // setting physical & virtual paths
     $mod_path = XOOPS_ROOT_PATH . "/modules/{$mydirname}";
     $mod_url = XOOPS_URL . "/modules/{$mydirname}";
     // defining class of piCal
     if (!class_exists('piCal_xoops')) {
         require_once "{$mod_path}/class/piCal.php";
         require_once "{$mod_path}/class/piCal_xoops.php";
     }
     // creating an instance of piCal
     $cal = new piCal_xoops("", $xoopsConfig["language"], true);
     $cal->use_server_TZ = true;
     // setting properties of piCal
     $cal->conn = $xoopsDB->conn;
     include "{$mod_path}/include/read_configs.php";
     $cal->images_url = "{$mod_url}/images/{$skin_folder}";
     $cal->images_path = "{$mod_path}/images/{$skin_folder}";
     $ret = $cal->get_xoops_search_result($keywords, $andor, $limit, $offset, $uid);
     return $ret;
 }