WordPress | Adminstration menus

Here is the article. 

Introduction

Usually, plugin and theme authors need to provide access to a settings (options) screen so users can customize how the plugin or theme is used. The best way to present the user with such a screen is to create an administration menu item that allows the user to access that settings screen from all the Administration Screens. This article explains how plugin authors can add administration menus and screens. Note: the following information assumes a knowledge of the basics of Writing a Plugin and using the Plugin API of Actions and Filters.