Unityのタイトルバーを「もなふわすい～とる～む」に設定出来るEditor拡張(Windows限定)

MonafuwaUtility.cs

#if UNITY_EDITOR_WIN
using System;
using System.Runtime.InteropServices;
using System.Text;
using UnityEditor;

namespace MonafuwaUtility
{
    static class MonafuwaSweetRoomEditor
    {
        [DllImport("user32.dll")]
        static extern IntPtr GetActiveWindow();

        [DllImport("user32.dll", EntryPoint = "SetWindowText", CharSet=CharSet.Unicode)]
        static extern bool SetWindowText(System.IntPtr hwnd, System.String lpString);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        static extern int GetWindowTextLength(IntPtr hWnd);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        
        // refered to: 
        //    - http://maketake.hatenablog.com/entry/advent-calendar/2019/unity/08
        [MenuItem("もなふわゆ～てぃりてぃ/Set Title")]
        static void SetTitle()
        {
            var window = GetActiveWindow();
            if (window == IntPtr.Zero) return;
            var length = GetWindowTextLength(window);
            var stringBuilder = new StringBuilder(length + 1);
            GetWindowText(window, stringBuilder, stringBuilder.Capacity);
            SetWindowText(window, "もなふわすい～とる～む");
        }
   }
}
#endif