Can we set Drag & drop area in flash as3

Hi Everybody,

Can We set drag & drop area in flash?

for example, i want to drag a movie clip in the sample_mc, and i want to move only sample_mc’s area, it doenst move out of sample mc.

My drag code is

drag_mc.addEventListener(MouseEvent.MOUSE_UP, stopMove);

// Functions

function startMove(evt:MouseEvent):void {

i add a picture about i want to do. Thanks