How to add movieclip inside textfield

Hi,
I would like to add a movieclip to a textfield. The objective is to be able to scroll the movie clip, since the uiscrollbar only works for textfield, i think my solution to scrolling the movie clip is to put it inside a textfield.

I have tried something like:

myText.addChild(myClip); but failed with error: 1061: Call to a possibly undefined method addChild through a reference with static type flash.text:TextField.