AS3: Using the Swipe Gesture in Flash Using ActionScript 3.0 - Source: http://www.republicofcode.com/tutorials/flash/as3swipegesture/

swipe.as

import flash.ui.Multitouch;
import flash.ui.MultitouchInputMode;

Multitouch.inputMode = MultitouchInputMode.GESTURE;

square_mc.addEventListener(TransformGestureEvent.GESTURE_SWIPE , onSwipe); 
function onSwipe (e:TransformGestureEvent):void{
if (e.offsetX == 1) { 
//User swiped towards right
square_mc.x += 100; 
}
if (e.offsetX == -1) { 
//User swiped towards left
square_mc.x -= 100;
} 
if (e.offsetY == 1) { 
//User swiped towards bottom
square_mc.y += 100; 
}
if (e.offsetY == -1) { 
//User swiped towards top
square_mc.y -= 100;
} 
}