The public source code for AutoIt can be found at http://www.autoitscript.com/autoit3/files/archive/autoit/ - look for a file called autoit-v3.n.n-src.exe The public version of the source code will be similar to the private/binary version but with some functionality removed. The source code is intended for those who wish to learn how AutoIt works and to contribute to its development. Please read the license that accompanies the source for more details and feel free to PM me or any member of t