HOWTO make and use a new application

How you go about making changes to components in large systems like ns-3 can seriously affect the level of happiness and stress in your life. So far we've taken an existing application and done nothing to it but change names. Even after this minor change, we observed that the application worked exactly as expected. This is a generic strategy. Take as much existing code as possible and then make small changes, stopping to make sure it all still works as much as possible. Although this may seem silly at first, it allows you to get your feet wet in a large system without getting into a state where you have no idea what is wrong and no idea how to find and fix the problem. This is not a pleasant place to be.

Good Luck !

http://www.nsnam.org/wiki/index.php/HOWTO_make_and_use_a_new_application