//create SO
var mySharedObject:SharedObject = SharedObject.getLocal("republicofcode");
mySharedObject.data.firstName = "John";
mySharedObject.data.lastName = "Doe";
mySharedObject.flush();

//Read SO
var mySharedObject:SharedObject = SharedObject.getLocal("republicofcode");
trace(mySharedObject.data.firstName);
trace(mySharedObject.data.lastName);


//Delete SO
var mySharedObject:SharedObject = SharedObject.getLocal("republicofcode");
mySharedObject.clear();


//example for SO where it stored a X & Y coordinates of a movie
////////////////////////////////////////////////////////////////


var mySO:SharedObject = SharedObject.getLocal("republicofcode");

movie_mc.x = mySO.data.my_x;
movie_mc.y = mySO.data.my_y;

if (!mySO.data.my_y) {
movie_mc.x = 150;
movie_mc.y = 100;
}

movie_mc.addEventListener (MouseEvent.MOUSE_DOWN, onDown);
function onDown (e:MouseEvent):void {
var my_mc = e.target;
my_mc.startDrag ();
}

movie.addEventListener (MouseEvent.MOUSE_UP, onUP);
function onUP (e:MouseEvent):void {
logo_mc.stopDrag ();
mySO.data.my_x = movie_mc.x;
mySO.data.my_y = movie_mc.y;
mySO.flush ();
}

movie_mc.buttonMode=true;

//create SO
var mySharedObject:SharedObject = SharedObject.getLocal("republicofcode");
mySharedObject.data.firstName = "John";
mySharedObject.data.lastName = "Doe";
mySharedObject.flush();

//Read SO
var mySharedObject:SharedObject = SharedObject.getLocal("republicofcode");
trace(mySharedObject.data.firstName);
trace(mySharedObject.data.lastName);


//Delete SO
var mySharedObject:SharedObject = SharedObject.getLocal("republicofcode");
mySharedObject.clear();


//example for SO where it stored a X & Y coordinates of a movie
////////////////////////////////////////////////////////////////


var mySO:SharedObject = SharedObject.getLocal("republicofcode");

movie_mc.x = mySO.data.my_x;
movie_mc.y = mySO.data.my_y;

if (!mySO.data.my_y) {
movie_mc.x = 150;
movie_mc.y = 100;
}

movie_mc.addEventListener (MouseEvent.MOUSE_DOWN, onDown);
function onDown (e:MouseEvent):void {
var my_mc = e.target;
my_mc.startDrag ();
}

movie.addEventListener (MouseEvent.MOUSE_UP, onUP);
function onUP (e:MouseEvent):void {
logo_mc.stopDrag ();
mySO.data.my_x = movie_mc.x;
mySO.data.my_y = movie_mc.y;
mySO.flush ();
}

logo_mc.buttonMode=true;

This snippet will help create a flashSharedObject a.k.a Flash Cookie, which much better than conventional cookies since they remain through all browsers and cannot be erased by the user using traditional cookie erasing methods

Create a Flash SharedObject (Flash Cookie)

object, flash

ActionScript 3