This document provides instructions for creating a simple "Hello World" application for a mobile device using Microsoft Visual Studio 2008. It describes opening Visual Studio, selecting the Smart Device template to create a phone replica, dragging a textbox onto the replica, writing the code "Hello World" and building the solution. Once built, pressing F5 will launch the emulator to display the text "Hello World" on the simulated mobile device screen. The document aims to demonstrate a basic first program for programmers learning to develop applications for mobile devices.