GESTURE_SWIPE alternative for Windows touchscreen?

I am building an AIR for Desktop app which has to run on a Windows touchscreen and I have belatedly remembered that the TransformGestureEvent.GESTURE_SWIPE is not supported on Windows (I ran the Supported Gestures test but thought the lack of SWIPE was due to the touch software which could be fixed with a driver update or such, not the OS).

Can anyone recommend an alternative to detect swipe-like gestures? I think the answer probably lies in using the TOUCH_START, TOUCH_MOVE and TOUCH_END events in some way but I'm not entirely sure.