public function Render($blnPrint = true)
 {
     $strRendered = parent::Render();
     $strRendered .= sprintf("<select id='%s' name='%s'>\n", $this->strControlId, $this->strControlId);
     foreach ($this->arrListItems as $objListItem) {
         //render list items
         $strRendered .= $objListItem->__toString();
     }
     $strRendered .= "</select>\n";
     if ($blnPrint) {
         _p($strRendered, false);
     } else {
         return $strRendered;
     }
 }