codding quadcopter if i buy a quadcopter ready to fly

hi...
Where can i get the coding if i buy ready to fly quadcopter using Atmega 2560.
anyone known the links ??????
i just want to analysis the codding in there.

Start here ardupilot.com

k.thank

so far very usefull.....as a beginner.........

what is .NET framework??...where it is to be install first before mission planner...where to get its

what is .NET framework??...where it is to be install first before mission planner...where to get its

There is wonderful site that lets you look for things ons the WWW. Here is a link to it
http://bit.ly/1wBihoe