This tutorial describes how to use Microsoft Visual Studio 2005 to create a C# client application from scratch. This application generates a ADT^A04 (Register a Patient) message after obtaining the following user input:

• The patient's ID number;
• The patient's surname;
• The patient's given name;
• The patient's social security number.

	Note that this is a very simple example whose purpose is to show you how to use Chameleon in the C# environment. In particular, this application does not use sockets to obtain messages from another application.

In this tutorial, you will:

• Create a simple C# application to generate HL7 messages;
• Create a VMD file containing a message definition;
• Generate stubcode that enables your application to interact with Chameleon;
• Import the Chameleon libraries into your application;
• Write code to obtain user input and generate a message based on this input;
• Test the application you have just created.