Question

I created a movieclip and extended it with my user defined class. Now if I want to use that movie clip and use the properties from the class how do i go around doing that?

Answer 1

//declare a variable of appropriate type and initialize it
var myClip:YourClipName = new YourClipName();
//now you can use myClip as if it were a movie clip variable
addChild(myClip);
myClip.x = 10;
//you can also access your custom properties/method with myClip
myClip.myAweSomeMethod(42, "Tadaa");
myClip.prop1 = "Some Value";

update for arrays:

//initialize
//n : Total_number_required
public var clips:Array = [];
for(var i:Number = 0; i < n; i++)
{
  var clip:YourType = new YourType();
  clip.x = 10 * i;
  clip.y = 20 * i;
  clips.push(clip);
}
//somewhere else in the code
//to get the clip at the kth index
var clip:YourType = YourType(clips[k]);
clip.x = 100;
clip.rotation = 90;