This code give me the window in the left top corner position:
using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
public class Test : ScriptableWizard
{
public string ObjectName;
[MenuItem("GameObject/Create Other/Test Objects...")]
static void CreateWizard()
{
DisplayWizard("Test Objects", typeof(Test));
}
}