Get a unique ID for a control.

	// Prints a not used ID that can be assigned to a control
	function OnGUI() {
		// Gets a ID for a control that cannot receive keyboard focus (A button)
		Debug.Log("Available id: " + GUIUtility.GetControlID(FocusType.Passive));
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void OnGUI() {
        Debug.Log("Available id: " + GUIUtility.GetControlID(FocusType.Passive));
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def OnGUI() as void:
		Debug.Log(('Available id: ' + GUIUtility.GetControlID(FocusType.Passive)))

Get a unique ID for a control, using an integer as a hint to help ensure correct matching of IDs to controls.

Get a unique ID for a control, using a the label content as a hint to help ensure correct matching of IDs to controls.