Style used by default for Window controls (SA GUI.Window).

	// Modifies only the window style of the current GUISkin
	var style : GUIStyle;
	var windowRect : Rect = Rect (20, 20, 120, 50);
	function OnGUI() {
		GUI.skin.window = style;
		windowRect = GUILayout.Window (0, windowRect, DoMyWindow, "My Window");
	}
	// Make the contents of the window
	function DoMyWindow (windowID : int) {
		 // This button will size to fit the window
		if (GUILayout.Button ("Hello World"))
			print ("Got a click");
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public GUIStyle style;
    public Rect windowRect = new Rect(20, 20, 120, 50);
    void OnGUI() {
        GUI.skin.window = style;
        windowRect = GUILayout.Window(0, windowRect, DoMyWindow, "My Window");
    }
    void DoMyWindow(int windowID) {
        if (GUILayout.Button("Hello World"))
            print("Got a click");
        
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public style as GUIStyle

	public windowRect as Rect = Rect(20, 20, 120, 50)

	def OnGUI() as void:
		GUI.skin.window = style
		windowRect = GUILayout.Window(0, windowRect, DoMyWindow, 'My Window')

	def DoMyWindow(windowID as int) as void:
		if GUILayout.Button('Hello World'):
			print('Got a click')