| UID0 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UID1 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UID2 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UID3 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UID4 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UID5 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UID6 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UID7 | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| Unknown | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| User | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| UserEventID | Graphics.UI.SDL.Events, Graphics.UI.SDL |
| unlockSurface | Graphics.UI.SDL.Video, Graphics.UI.SDL |
| unwrapBool | Graphics.UI.SDL.General, Graphics.UI.SDL |
| unwrapInt | Graphics.UI.SDL.General, Graphics.UI.SDL |
| unwrapMaybe | Graphics.UI.SDL.General, Graphics.UI.SDL |
| update | Graphics.UI.SDL.Joystick, Graphics.UI.SDL |
| updateRect | Graphics.UI.SDL.Video, Graphics.UI.SDL |
| updateRects | Graphics.UI.SDL.Video, Graphics.UI.SDL |
