Have followed all the steps at http://www.packtpub.com/comment/reply/7089 to create a custom module.

I am able to create it and it is showing under the Modules and is getting enabled. However as the purpose of this module is to create a new block it is not doing so. Its not showing under the Structure/Blocks. Any reasons?

Here's the code for easy review: The first.info file:::

;$Id$

name = First
description = A first module.
package = Drupal 7 Development
core = 7.x
files[] = first.module

;dependencies[] = autoload
;php = 5.2

The first. module file::::

 t('A listing of all of the enabled modules.'),
    'cache' => DRUPAL_NO_CACHE,
  );

  return $blocks;
}

/**
 * Implements hook_block_view().
 */
function first_block_view($block_name = '') {
  if ($block_name == 'list_modules') {
    $list = module_list();

    $theme_args = array('items' => $list, 'type' => 'ol');
    $content = theme('item_list', $theme_args);

    $block = array(
      'subject' => t('Enabled Modules'),
      'content' => $content,
    );

    return $block;
  }
}