There are several sources of documentation on ATK. Based on what you are looking for, you may need one of the resources below.
Most of the documentation for the ATK framework can be found on our wiki.
The ATK framework has extensive API documentation. Documentation is available for several versions:
The downloadable Demo Application contains inline sourcecode comments that explain every line of code in the demo. This is very useful documentation for people new to the ATK framework.
If you can't find what you need in the documentation on the left, feel free to post a message in our forum.