How to controll Selection Color with AS

programming flash
1

I need to colorize the selection of a text.

The default colors for a selected text are white for text and black for the surrounding border.

I need to customize the surrounding border to a desired color.

Now:

On the stage I have a dynamic text box with “mytext” instance and a movie clip. off course I have some text inside the dynamic text box

On the first keyframe I have this code: (thank you, senocular !!!)

 
TextField.prototype.selectAll = function(){ 
	 Selection.setFocus(this); 
	 Selection.setSelection(10,this.length-20); 
	 **Selection.setSelectColor(0x993377); //here is the problem**
}

on the movie clip I have this code:

 onClipEvent(enterFrame){
_root.mytext.selectAll();
}

If I remove the **"Selection.setSelectColor(0x993377); " **line, everything is ok except the fact that the selection border is not colorized. If I leave that line, I encounter a strange error: “There is no method with the name ‘setSelectColor’.”

How can I do to set a selection within a textbox and also to set the color of the selection background?

thank you in advance!