Hack Making help

HOW DID THE FIRST HACK CODERS KNOW WHAT TO TYPE INTO C++ OR SOMETHING LIKE THAT..I GUESS WHAT IM REALLY TRIEN TO SAY IS HOW DID THEY KNOW THAT CODE WOULD MAKE LIKE A WALLHACK OR SOMETHING...

SORRY FOR BEING A NOOB PLEASE DONT FLAME..THANK YOU

The first people to hack a game would most likely be game programmers. They would know how because they studied DirectX and whatever programming they needed to know to make a video game. It may seem like magic, but not to sound cliche... knowledge is power. To understand how to hack something you need to understand how it works :P