Slider.fillRect

Description

Optional RectTransform to use as fill for the slider.

#pragma strict
// Required when Using UI elements.
public class Example {
	public var mainSlider;
	public var newFillRect;
	//Deactivates the old FillRect and assigns a new one.
	function Start() {
		mainSlider.fillRect.gameObject.SetActive(false);
		mainSlider.fillRect = newFillRect;
	}
}

using UnityEngine;
using System.Collections;
using UnityEngine.UI;  // Required when Using UI elements.

public class Example : MonoBehaviour 
{
	public Slider mainSlider;
	//Reference to new "RectTransform"(Child of FillArea).
	public RectTransform newFillRect;

	//Deactivates the old FillRect and assigns a new one.
	void Start() 
	{
		mainSlider.fillRect.gameObject.SetActive (false);
		mainSlider.fillRect = newFillRect;
	}
}