how to set CSS for the editor area?

<?
  // style
  $style = "
          <style>
            BODY
            {
              font-family: verdana, tahoma, arial;
              font-size: 12px;
              color: #70C000;
            }

            A
            {
              text-decoration: none;
              color: #75FF0C;
              text-decoration: underline;
            }
          </style>
        ";

  // capturing content
  $content = file_get_contents("index.html");
  $content = preg_replace("/.*<partners>(.*)<\/partners>.*/is", "\\1", $content);

  $oFCKeditor = new FCKeditor('FCKeditor') ;
//  $oFCKeditor->BasePath = '/gg/FCKeditor/';
  $oFCKeditor->BasePath = 'http://localhost/Gegarandeerd%20Goedkoper/site/FCKeditor/';
  $oFCKeditor->ToolbarSet = 'GegarandeerdGoedkoper';
  $oFCKeditor->Width = "590";
  $oFCKeditor->Height = "350";
  $oFCKeditor->Value = $style . $content;
  $oFCKeditor->Create() ;
?>