Custom Manager Pages: How to Submit Variables to the Controller File?

The second one should definitely work as long as you place it after the save().

$fieldstxt = array();
$fieldtxt['pagetitle'] = $name;
...
$resource = $modx->newObject('modSymlink', $fieldtxt);
$resource->save();

$idoftxt = mysql_insert_id();
return $idoftxt;

FYI, the ID is set when you call save(), so you can just use:

return $resource->get('id');

... Perfect! Thanks a lot for your help. As soon as your MODx-Team changed the links on http://modx.com/community/wall-of-fame/ to direct links to the donator (at the moment these are still redirects what is not very good of SEO-reasons ) we will like to do our next donations )))