While windowed game is in the background (not the target of focus or capture), the game continues to track /capture mouse movement and provide tooltip information in-game for your current cursor coordinates. As an example, while paused in windowed full-screen and typing this message into the browser window, I can mouse down over "drag files here to attach" on your form and see the lower half of a tooltip pop up on the periphery. Moving my cursor around in this form's window as I type provides me with real-time change between tooltips in 25% of my screen that remains visible behind the browser. There is not any delay or performance decrease while accessing this tooltip information, as though I were still in-game. I suspect this accounts at least partially for the high dynamic resource usage I've been seeing even when the game is paused and minimized.