Creating custom module in Drupal 7

Drupal is very rich in terms of modules. There are hundreds of modules available on Drupal official site. One just need to find the appropriate module and start playing with that module after installing it in his application. 

But sometimes, there comes a situation when developer has to develop his own module. Here I am writing the steps to develop a module which will create a web form. In this tutorial we will learn how to develop a web form, validating the data & submitting data into database.