have custom Facebook button in game

Hey,

I am using the Facebook SDK for my game. So I was wondering whether it is possible to use your own custom made Button which will link to Facebook or if their are special buttons provided by Facebook which you are only allowed to use.

Use this so when they press a GUI.Button, it opens the link specified in the inspector

using UnityEngine;
using System.Collections;

public class OpenFacebookPage : MonoBeahviour {
	
	public string URL;

	void OnGUI() {
		if(GUI.Button(new Rect(10, 10, 50, 50), "Open URL")) {
			Application.OpenURL(URL);
		}
	}
}

That’s not what I mean. As I don’t want to open the Facebook page. I was just asking about the design of the button which for example is used to share some content of my game.