How to use maked screenshot like a texture?

Hi, I doing screenshots like that:

	void Update () {
		if (Input.GetKeyDown (KeyCode.X)) {
			a += 1;
			nazwa = "Screenshot";
			nazwa = nazwa + a.ToString ();
			Application.CaptureScreenshot("Assets/Screenshots/"+nazwa+".png");
			Debug.Log ("foto");
		}
	}

and how can i use maked screenshot to texture the object. Unity doesnt refresing assets in game and texturing doesnt work to.
Thanks for help.

public string url = “file://”;
IEnumerator GetTexture() {
WWW www = new WWW(url);
yield return www;
// your texture is in www.texture variable
renderer.material.mainTexture = www.texture;
}

You press PrntScrn paste it into paint and then simply save it as a .png and drag it onto the assets then onto the object. Easy.