public function GetField($Field, $Table = '') {
      if ($Table != '')
         $this->CurrentTable = $Table;
      
      if (!is_array($this->_Schema))
         $this->_Schema = array();
         
      $Result = FALSE;
      if ($this->FieldExists($this->CurrentTable, $Field) === TRUE)
         $Result = $this->_Schema[$this->CurrentTable][$Field];
         
      return $Result;
   }