drupal 7 module example

drup.php

function og_netforum_importer_start($form, &$form_state) {
 
  // here I build the form 

  return $form;
}

/* 
  Validate the page by setting a form cache...
 */
function og_netforum_importer_start_validate(&$form, &$form_state) {
   
   // here i write to db 

}

/* 
  Now that we know the form cache is validated we will redirect! 
 */
function og_netforum_importer_start_submit($form, &$form_state) { 
  
  // here i redirect to next portion of setup ... 
  drupal_goto("admin/config/og_netforum/wizard/setup", array(), 302);
}