How do they do this...?

[SFSxOI]

Today while browsing around the net i came across a post on a gaming forum complaining about cheats in a game. A picture was provided that showed what were players in the game where their locations were indicated by a red dot with a distance beside it. From the post I take it that these dots represented the 'enemy' side in the FPS game. Also from the post I understood that this was not supposed to be and was a game hack using directX that someone created.

I don't do many games, but since i'm working on learning directX stuff, it got me curious. How do you do code something like that? How do you hook into directX that way and make it show something like that?

[traumatic]

Has this been your alter ego?
http://www.purebasic.fr/english/viewtopic.php?t=20906

[SFSxOI]

Well ...no

Ahhhh...forgot all about that, was concentrating so hard on the red dots I forgot about the forrest (can't see the forrest for the trees), thought it was some kind of dark black arts secret directX magic or something.

Has this been your alter ego?
http://www.purebasic.fr/english/viewtopic.php?t=20906

[Joakim Christiansen]

I guess the server sends the location of each player to the client and that they somehow "hacked" into that data.

[Kale]

When i used to play in the half life league people used to use hacked opengl dlls which made the walls tranparent. Maybe they're using a similar trick.