HelpC++ hack help

I've been looking to start making C++ hacks (injectable dll), but I am not sure what libraries I would need to include to interact with the game. If you guys could tell me what libraries I need to include and where I could find them, that would be great.
Thanks.

You don't NEED the sdk

__FASTCALL __FASTCALL __FASTCALL __FASTCALL garry_state* DWORD

const char*

--golden angle creator

guys pls stop using DWORD for pointers and arithmetic on pointers
use char * and void *

you need a brain