It's been done, albeit a bit simpler, to cheat/assist in collusion in online poker. You don't have an API (for obvious reasons) into the poker clients, so you

It's been done, albeit a bit simpler, to cheat/assist in collusion in online poker. You don't have an API (for obvious reasons) into the poker clients, so you have software that basically reads the screen as an image and works the keyboard/mouse.... the more sophisticated ones do it in a VM to avoid detection (some poker software actively scans your machine for known bot software or other tampering)