Having written our first program, Lesson 15 delves further into what writing basic applications are all about, looking at the API and its organization and focusing on an essential: messaging. Also included in this lesson are the finished sources for those who don’t want to mess around with typing the project out.
This is a companion discussion topic for the original entry at https://www.haiku-os.org/blog/darkwyrm/2010-04-20_lesson_15_haiku_api_10000_feet/