In which program can I program a hack for mt2 with the graphic interface is in game

I have already programmed some bots using the auto hot key, but I would like to create them and that the interface to use the hack is found in the game, like this hack [Only registered and activated users can see links. Click Here To Register...]

Do you know what language it is made in?
Do you know any public project that can be reviewed, no matter if it is very simple?
I just need to know where to start.

Thank you

if you can´t find out on your own, how are you supposed to be able to code a hack?
coding hacks is a whole different pair of shoes than writing some small ahk scripts

I dont have much ideas about coding an hack, but i think its in python and injected to the client, because of the ingame-interface. But the first thing is, if you want to code an hack, try it first maybe with autoit?