materio-base-d7/sites/all/modules/contrib/admin/admin_theme/admin_theme.install

<?php
// $Id: admin_theme.install,v 1.1.2.2.4.4 2009/10/20 18:25:45 davyvandenbremt Exp $

/**
 * Implementation of hook_install().
 */
function admin_theme_install() {
  // updating module weight to 10 to make it run after system (for user access checks etc)
  db_query("UPDATE {system} SET weight = 10 WHERE name = 'admin_theme'");
  
  $link = array('!link' => l(t('Administer > Appearance > Administration theme'), 'admin/appearance'));
  drupal_set_message(t("Administration theme module settings are available under !link", $link));
}

/**
 * Implementation of hook_uninstall().
 */
function admin_theme_uninstall() {
  // cleaning up general admin theme variables
  variable_del('admin_theme_path');
  variable_del('admin_theme_path_disallow');
  
  // cleaning up module defined admin theme variables
  
  // we need to add admin theme's explicitly because it's not in the list of modules anymore
  $admin_theme_options = admin_theme_admin_theme_info();
  $options = array();
  foreach ($admin_theme_options as $option => $info) {
    $info['option'] = $option;
    $info['module'] = 'admin_theme';
    $options[] = $info;
  }
  
  // mergin admin theme's options with other module options
  // @fixme does this work if other modules are also uninstalled at the same time?
  $list = array_merge(admin_theme_list(), $options);
  
  // deleting the module defined variables
  foreach ($list as $info) {
    $var = admin_theme_variable_name($info['module'], $info['option']);
    variable_del($var);
  }
}