First ,
we have to import the flash filter
import flash.filters.DropShadowFilter;

Now create a runtime Movieclip as

let we create a box make a sixe of x and y as 50

here the code:

this.createEmptyMovieClip(‘Box’,2)
with (Box)
{
beginFill(0×000000, 100);
moveTo(0, 0);
lineTo(100, 0);
lineTo(100, 100);
lineTo(0, 100);
lineTo(0, 0);
endFill();
}
Box._x = 50
Box._y = 100

and then

in that EnterFrame we have to give the value.. and call the variable
and make values as Dynamic text
Here the code as,

Box.onEnterFrame = function()
{

ds.quality++
Box.filters = [ds]
_root.reson.text = ‘ For Box : The Drop Shadow option Distance = 2, Angle = 45 degree , Color = 0×66FF33, Alpha = 1, Blur X = 5 Blur Y = 5 Strength = 2 , Qulaity = 3 Inner = false, Knock-out = false, HideObject = false’;

}

var ds = new DropShadowFilter (2,45,0×66FF33,0.8,5,5,2,3,false,false,false);

Have a joy with Filter….

Thanxs!….