Just to give you a heads up...
Warcraft is directx8.. I got my program working to get msgs in game. Here's a screenshot. It's in portuguese but it gives you the idea. The looks are extremely simple for now. I can do transparent boxes and change font sizes and colors..
What I haven't mannaged to do just yet is to send a msg from the game to msn without losing focus on the game :/
And from what it looks I simply can't get to that. It's above my head to program a proxy tool to talk to the swichboard and nobody seems to want the challenge either
My program also works on CS-Source.
I'm still researching about this proxy thing but if I decide to give up (which should be sometime soon) I'll post the code and dlls of my program so you can at least see your msgs.
Have fun