Hard coded, it's a pain for sure, the d3d mod can address resolutions higher than 1024x768 but the mouse cursor can't, it stays fixed to 1024x768. try this, load a high res and in any screen you will notice on the right side & bottom the mouse cursor will disappear by the amount of pixels greater than the stock 1024x768, this actually causes problems with slide out dials etc on the right and bottom of screen, would love to find a fix!
