Macros for games

[Aberf]

Okay, I want to make a program that would run in the background, while you play a game. And when you press say CTRL + Z then it will go into the game and drink a heal potion. How would I do this?

Thanks in Advance :)

[Aberf]

For an example of what I mean see www.tugsoft.com. They have a program called Ultima Online Assist, which is what I want to do but need some info on how to do it.