// This object will always look at the mouse cursor
myTank.addEventListener(Event.ENTER_FRAME, tankEnterFrame);
// This function will be launched every frame (25 times by seconds);
function tankEnterFrame(pEvt) {
    // pEvt.currentTarget : myTank
    var mc = pEvt.currentTarget;
    // Get the radian angle between the tank and the cursor
    // You can also replace mouseX and mouseY by another coordinates
    var angleRadian=Math.atan2(mouseY-mc.y,mouseX-mc.x);
    // Convert the radian angle in dedree
    var angleDegree = angleRadian * 180 / Math.PI;
    // Set the orientation
    mc.rotation = angleDegree;
    // Display angle of rotation in degree
    txtAngle.text = Math.round(angleDegree) + "°";
}