gistfile1.cs

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Reflection;

public class HogeSearchableEditorWindow : SearchableEditorWindow
{
	static SearchableEditorWindow window = null;

	[MenuItem("Window/HogeSearchableEditorWindow #%p")]
	static void Open ()
	{
		GetWindow<HogeSearchableEditorWindow> ().Close ();
		window = SearchableEditorWindow.CreateInstance<HogeSearchableEditorWindow> ();
	}

	void OnGUI ()
	{	
		if (Event.current.keyCode == KeyCode.Escape) {
			GetWindow<HogeSearchableEditorWindow> ().Close ();
		}
		typeof(SearchableEditorWindow).GetMethod ("SearchFieldGUI", (BindingFlags.Instance | BindingFlags.NonPublic)).Invoke (window, new object[0]);
	}
}