How to create Query Module?

Hi
Please have look below listed code to create custom module for above listed feature.

Module name = 'Query_custom'

1) create folder with name 'query_custom'
2) create folder with name 'query_custom.info' under the folder 'query_custom'

; $Id: query_custom.info,v 1.01 2013/02/12 19:59:45 tusharb Exp $

name = "Query Module"
description = Module provide the send query functionality for registration.
core = 7.x
files[] = query_custom.module
package = "Custom Module"
dependencies[] = ctools

; check http://example.com/student_registration replace example.com with your domain name.

3) Create file with name 'query_custom.module' under the folder 'query_custom'

<?php

function query_custom_menu() {
 $items = array();
 $items['query_custom/%ctools_js/send'] = array(
    'title' => t("Send query"),
    'page callback' => '_send_query_modal_box',
    'access callback' => TRUE,
    'type' => MENU_NORMAL_ITEM,
  );
  $items['student_registration'] = array(
    'title' => 'Student Registration',
    'page callback' => 'drupal_get_form',
    'page arguments'=> array('_student_registration_form'),
    'access callback' => TRUE,
    'type' => MENU_NORMAL_ITEM,
  );
  return $items;
}


function _student_registration_form() {
  $form['first_name'] = array(
    '#type' => 'textfield',
    '#title' => t('First Name'),
    '#required' => TRUE,
  );
  
  $form['last_name'] = array(
    '#type' => 'textfield',
    '#title' => t('Last Name'),
    '#required' => TRUE,
  );
  
  $form['send_query'] = array(
    '#markup' => _actual_popup(),
  );
  
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit'),
  );
  return $form;
}

function _actual_popup() {
  ctools_include('ajax');
  ctools_include('modal');
  ctools_modal_add_js();
  $sample_style = array(
    'ctools-sample-style' => array(
      'modalSize' => array(
        'type' => 'fixed',
        'width' => 656,
        'height' => 450,
        'addWidth' => 20,
        'addHeight' => 15,
      ),
      'modalOptions' => array(
        'opacity' => .5,
        'background-color' => '#000',
      ),
      'animation' => 'fadeIn',
      'modalTheme' => 'CToolsSampleModal',
      'throbber' => theme('image', array('path' => ctools_image_path('ajax-loader.gif', 'ctools_ajax_sample'), 'alt' => t('Loading...'), 'title' => t('Loading'))),
    ),
  );

  drupal_add_js($sample_style, 'setting');
  ctools_add_js('ctools-ajax-sample', 'ctools_ajax_sample');
  ctools_add_css('ctools-ajax-sample', 'ctools_ajax_sample');
  
  $links =  array();
  $links[] = ctools_modal_text_button('Send query', 'query_custom/nojs/send', NULL, 'ctools-modal-ctools-sample-style');
  $output = theme('item_list', array('items' => $links));
  return $output ;
}
 

function _send_query_modal_box() {
  global $base_url;
  $submission =  (object) array();
  
  ctools_include('modal');
  ctools_include('ajax');
  $form_state = array(
    'title' => t(''),
    'ajax' => TRUE,
  );
  
  $form_state['build_info']['args'] = array();
  $output = ctools_modal_form_wrapper('_send_query_form', $form_state);
  if (!empty($form_state['executed'])) {
    $output = array();
    $output[] = ctools_modal_command_dismiss(t('Success!'));
  }
  print ajax_render($output);
  exit;
}


function _send_query_form($form, &$form_state) {
  $form= array();
  $form['institute_name'] = array(
    '#type' => 'select',
    '#options' => array(
      'abc_college' => t('ABC College'),
      'def_college' => t('DEF College'),
      'ghi_college' => t('GHI College'),
      'klm_college' => t('KLM College'),
    ),
    '#title' => t('Select school/college'),
  );
  
  
  $form['query_title'] = array(
    '#type' => 'textfield',
    '#title' => t('Query Information'),
    '#required' => TRUE,
  );
  
  $form['message'] = array(
    '#type' => 'textarea',
    '#required' => TRUE,
    '#title' => t('Query details'),
  );
  
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit query'),
  );
  return $form;
}

5) Save this folder under 'example.com/site/all/module'(replace example with your domain name).
6) Enable this module at 'example.com/admin/modules'.
7) visit 'example.com/student_registration' to check the required feature(click on 'send query will open popup').

let me know if any query.

replace example.com with your domain name