Problem with accessing form data

Hi
I have a simple form in my view where the user enters a 4 digit
numeral code, in the controller action am unable to access this code,
it would be great if some one could tell me how to access this code in
the action and then pass this code as a parameter to another
controller action.

*******Form**********
<p>Enter User Code</p>
<?php echo $form->Create('Admin',array('action'=>'view_specific'));
echo $form->input('Code');
echo $form->end('Submit');
?>

*********Action************
function view_specific()
{
if($this->data)
{
// $code=get data from teh form;

//$this->redirect(array('action'=>'view_specific_result',
$code));

}
}

Thanks

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