Displaying text in a dynmic text field

Try changing to...

function moveInvestmentButton(e: MouseEvent): void
{
    mc_InvestmentButton.startDrag(false, sliderBounds);
    stage.addEventListener(MouseEvent.MOUSE_UP, moveInvestmentButtonOFF);
stage.addEventListener(MouseEvent.MOUSE_MOVE, adjustCurrentRate);
}

function moveInvestmentButtonOFF(e: MouseEvent): void
{
    mc_InvestmentButton.stopDrag();
    stage.removeEventListener(MouseEvent.MOUSE_UP, moveInvestmentButtonOFF);
stage.removeEventListener(MouseEvent.MOUSE_MOVE, adjustCurrentRate);
}

function adjustCurrentRate(evt:MouseEvent):void {
txt_CurrentRate.text =  String(Math.floor(10*(mc_InvestmentButton.y - slider_background_mc.y)/(slider_background_mc.height - slider_background_mc.y)));
}

use:

import flash.display.MovieClip; import flash.events.MouseEvent; import flash.events.Event; import flash.geom.Rectangle; var sliderBounds: Rectangle = new Rectangle(slider_background_mc.x, slider_background_mc.y, 0, slider_background_mc.height); mc_InvestmentButton.addEventListener(MouseEvent.MOUSE_DOWN, moveInvestmentButton); mc_InvestmentButton.addEventListener(MouseEvent.MOUSE_UP, moveInvestmentButtonOFF); txt_CurrentRate.text = String(mc_InvestmentButton.y); var displayRate = txt_CurrentRate; // Your start functions should now be this function moveInvestmentButton(e: MouseEvent): void {     mc_InvestmentButton.startDrag(false, sliderBounds);     stage.addEventListener(Event.ENTER_FRAME,textF);        trace(mc_InvestmentButton.y);     trace(displayRate);        } function textF(e:Event):void{ your_tf.text=String(mc_InvestmentButton.y);  // use your tf's name/reference. } function moveInvestmentButtonOFF(e: MouseEvent): void {     mc_InvestmentButton.stopDrag();     stage.removeEventListener(Event.ENTER_FRAME,textF); }

Is the text value, 5% for instance, meant to correspond to the values listed on the scroller?

The way that you have this set of functions written, you are adding an event listener that already exists on the mouseDown event and then removing it on the mouseUp event. I don't think that you really want to do either of those things.

If all of the objects are on the main timeline and you want the value in the text box to correspond with the values on the scroll bar, then you need to build an inverse relationship between the y position of the scroll button and the value that you want to show. The baseline for the y, vertical position, property is the bottom of the stage. This is y 0 on the main timeline. So, as you move up, the value increases. However, your example looks like you want to get a smaller value as the position of the button moves up.

Is any of that correct?