Is there a way to draw text over an topmost fullscreen application (like game)?

[dzenan]

Well I’m trying to create this small app that notifies me how long I have played a game. Now I want it to draw a short message or picture telling me that I have played game for N minutes. Is it possible and how to display something over a fullscreen directx or opengl game, without interrupting it? I have already tried with simple dialogs in MFC with Topmost attributes set but it doesn't seem to work on fullscreen games. I would appreciate suggestions and samples on how to do that. I'm not so experienced direcx programmer. ~dzenan~