I want to write a short of chat client that display the messages in-game (OpenGL/DirectX), but I really don't know how to handle this.
It is easy to write my client in my graphic context... but what about the other game-apps context?.
My primary target is Windows and Win 7, then mac, then Linux. But I would be happy to solve it for Windows.
By the way, it should try to be the most compatible with different DX versions and OGL versions.