I am utilizing Drupal 7 for my web site. I created customized settings web page with customized kind in it, however Drupal Developer drawback is I do not know correct strategy to load inserted worth from database to my kind after saving it, and each time I write one thing in it, info is written to database, however kind is empty. My code seems to be like this for this:

operate registration_pdf_form($kind, $form_state) {     $kind['registration_body_twoside'] = array(         '#sort' => 'text_format',         '#title' => t('Two-sided PDF'),     );     $kind['registration_body_threeside'] = array(         '#sort' => 'text_format',         '#title' => t('Three-sided PDF'),     );     $kind['actions'] = array(         '#sort' => 'actions'     );     $kind['actions']['submit'] = array(         '#sort' => 'submit',         '#worth' => t('Save settings')     );     return $kind; } operate registration_pdf_form_submit($kind, $form_state){     $values = array(         'reg_twoside' => $form_state['values']['registration_body_twoside']['value'],         'reg_threeside' => $form_state['values']['registration_body_threeside']['value'],     );     $insert = db_update('pdf_settings')         -> fields(array(             'reg_twoside' => $form_state['values']['registration_body_twoside']['value'],             'reg_threeside' => $form_state['values']['registration_body_threeside']['value'],         ))         ->execute();     drupal_set_message(t('Settings have been saved')); } 

How do I get values to my fields from database?