Drupal How to add the dropdown in the search box -

By default we have a Drupal search box,

I want to add a dropdown, Type (eg page, story, article)

I know there are so many modules, but I want to know, using hook module, I want to add dropdown

I want to do this only with hook method

A preproduction Try searching the form in the template.php file of your theme. Its a good example.