Gaming Hacking Questions C/C++

Hello, I have basic C Knowledge and will be having C++ Lessons shortly and I wanted to start do hacks for games (mainly Cabal online) Though I have a few questions.
Even if I know the programing language how do I apply it to the game? I mean how do I find the Codes to make a wallhack for example.

How do I make a GUI? As I said I only know C at the moment and from what I see C doesn't have GUI support, can some one tell me a nice GUI for C++?.

Thanks a lot,

neither does c++ have any GUI support. GUIs are platform specific, on windows all you'd need to do is call WinAPI functions which will create windows for you (see msdn: CreateWindow/Ex ), those functions are all C-style so you could do it with c (and any other language supporting c-style function calls).

You can use Qt to create GUIs and it support multiple platforms.
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~Uthar