Thit is whats up next.

EditorWindowTutorial.cs

#region using

using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif
//using UnityEngine.UI;
//using UnityEngine.SceneManagement;
//using System;
//using System.Collections;
using System.Collections.Generic;


#endregion


#region Script

namespace ZeredaGamesEngine.Core.MusicListsExamples.Example3
{

    #region Attributes

    //[RequireComponent (typeof())]
    //[System.Serializable]

    #endregion

    public class EditorWindowTutorial : EditorWindow
    {

        #region Variables
        static List<string> LoadPaths = new List<string>(){
                "ZeredaGamesTutorialAssets/GeneralGameAssets/MusicAssetList",
                "EditorWindowTextures/folder-icon",
                "EditorWindowTextures/email-icon",
                "EditorWindowTextures/facebook-icon",
                "EditorWindowTextures/unity-icon",
                "EditorWindowTextures/skype-icon",
                "EditorWindowTextures/LogoTexture",
                "ZeredaGamesTutorialAssets/GeneralGameAssets/WindowAsset"
        };

        static Texture skypeTexture;
        static Texture emailTexture;
        static Texture headerLogoTexture;
        static Texture folderIcon;
        static Texture unityTexture;
        static Texture facebookTexture;


        static MusicAssetList asset = null;
        static int selectionA, selectionB;
        private static EditorWindowTutorial window = null;

        ///<summary>  Sets Defaults in update.</summary>
        public static bool setDefaults;

        public bool DebugMode;

        #endregion

        #region Unity Methods

        ///<summary>  Awake is called when the script instance is being loaded.</summary>
        void Awake()
        {

            DebugMode = GetDebugMode;

        }

        ///<summary>  Start is called just before any of the Update methods is called the first time.</summary>
        void Start()
        {

        }

        ///<summary>  Update is called every frame, if the MonoBehaviour is enabled.</summary>
        void Update()
        {

        }

        #endregion

        [MenuItem("Window/Editor Tools/ZeredaGames/Game Making Editor Tools/Open My Custom Editor Window - Resizable", false, 0)]
        public void Initialize()
        {
            window = GetWindow;

            // Load any and all resources now and after that this method should be complete.
            //
            window.DoResourceCheckAndLoad();
        }

        [MenuItem("Window/Editor Tools/ZeredaGames/Game Making Editor Tools/Open My Custom Editor Window - Fixed", false, 0)]
        public void InitializeOther()
        {
            window = GetWindowWithARect();

            // Load any and all resources now and after that this method should be complete.
            //
            window.DoResourceCheckAndLoad();
        }

        [MenuItem("Window/Editor Tools/ZeredaGames/Tutorials/Show Tutorial Window")]
        static EditorWindowTutorial SelectReadme()
        {
            var ids = AssetDatabase.FindAssets("EditorWindowTutorial t:EditorWindowTutorial");
            if (ids.Length == 1)
            {
                var readmeObject = AssetDatabase.LoadMainAssetAtPath(Application.dataPath + "Resourcex/" + LoadPaths[7]);

                Selection.objects = new UnityEngine.Object[] { readmeObject };

                return (EditorWindowTutorial)readmeObject;
            }
            else
            {
                Debug.Log("Couldn't find a Custom Editor Window");
                return null;
            }
        }
        static string StaticString="My Window";
        private EditorWindowTutorial GetWindowWithARect()
        {
            //Set the window to spacific size
            //
            EditorWindow.GetWindowWithRect(typeof(EditorWindowTutorial), new Rect(100, 250, 455, 650), true, StaticString);
            //automatically repaint whenever the scene has changed (for caution)
            //
            window.autoRepaintOnSceneChange = true;
            return (EditorWindowTutorial)EditorWindow.GetWindow(typeof(EditorWindowTutorial), true, "My Custom Window (Look you can Write w.e you like here!))");
        }

        void DoReCheck()
        {
            if (asset == null || headerLogoTexture == null || emailTexture == null || unityTexture == null || facebookTexture == null || skypeTexture == null || folderIcon == null)
            {
                asset = (MusicAssetList)Resources.Load(LoadPaths[0]);
                folderIcon = Resources.Load<Texture>(LoadPaths[1]);
                emailTexture = Resources.Load<Texture>(LoadPaths[2]);
                facebookTexture = Resources.Load<Texture>(LoadPaths[3]);
                unityTexture = Resources.Load<Texture>(LoadPaths[4]);
                skypeTexture = Resources.Load<Texture>(LoadPaths[5]);
                headerLogoTexture = Resources.Load<Texture>(LoadPaths[6]);
            }
        }

        void DoResourceCheckAndLoad()
        {
            // Let's also do a safety check for each our resources, and desplay whats happening
            // to the console.
            Object obj = Resources.Load(LoadPaths[0]);
            if (Equals(obj, null))
            {
                asset = MusicAssetList.CreateNewAsset();
                if (DebugMode)
                    Debug.Log("Asset Crested @ " + LoadPaths[0]);
            }
            else {
                asset = (MusicAssetList)Resources.Load(LoadPaths[0]);
                if (DebugMode)
                    Debug.Log("Asset Found @ " + LoadPaths[0]);
            }

            // Make sure there is a folder in resources named "EditorWindowTextures"
            //

            // small icon image for Documentation URL Link
            Object obj2 = Resources.Load(LoadPaths[1]);
            if (Equals(obj2, null))
            {
                if (DebugMode)
                    Debug.Log("Asset missing @ " + LoadPaths[1]);
            }
            else {
                folderIcon = Resources.Load<Texture>(LoadPaths[1]);
                if (DebugMode)
                    Debug.Log("Asset found @ " + LoadPaths[1]);
            }

            // small icon image for email link
            Object obj3 = Resources.Load(LoadPaths[2]);
            if (Equals(obj3, null))
            {
                if (DebugMode)
                    Debug.Log("Asset missing @ " + LoadPaths[2]);
            }
            else {
                emailTexture = Resources.Load<Texture>(LoadPaths[2]);
                if (DebugMode)
                    Debug.Log("Asset found @ " + LoadPaths[2]);
            }

            // small icon image for skype 'Contact beauty' image
            Object obj4 = Resources.Load(LoadPaths[3]);
            if (Equals(obj4, null))
            {
                if (DebugMode)
                    Debug.Log("Asset missing @ " + LoadPaths[3]);
            }
            else {
                skypeTexture = Resources.Load<Texture>(LoadPaths[3]);
                if (DebugMode)
                    Debug.Log("Asset found @ " + LoadPaths[3]);
            }

            // small icon image for facebook 'Contact beauty' image
            Object obj5 = Resources.Load(LoadPaths[4]);
            if (Equals(obj5, null))
            {
                if (DebugMode)
                    Debug.Log("Asset missing @ " + LoadPaths[4]);
            }
            else {
                facebookTexture = Resources.Load<Texture>(LoadPaths[4]);
                if (DebugMode)
                    Debug.Log("Asset found @ " + LoadPaths[4]);
            }

            // small icon image for Unity 'Contact beauty' image
            Object obj6 = Resources.Load(LoadPaths[5]);
            if (Equals(obj6, null))
            {
                if (DebugMode)
                    Debug.Log("Asset missing @ " + LoadPaths[5]);
            }
            else {
                unityTexture = Resources.Load<Texture>(LoadPaths[5]);
                if (DebugMode)
                    Debug.Log("Asset found @ " + LoadPaths[5]);
            }

            //Top Logo Image at top of our window ->your logo
            Object obj7 = Resources.Load(LoadPaths[6]);
            if (Equals(obj7, null))
            {
                if (DebugMode)
                    Debug.Log("Asset missing @ " + LoadPaths[6]);
            }
            else {
                headerLogoTexture = Resources.Load<Texture>(LoadPaths[6]);
                if (DebugMode)
                    Debug.Log("Asset found @ "+ LoadPaths[6]);
            }
        }

        //Here is how we display all out data on our window, and
        //Organizes our window layout.
        void OnGUI()
        {
            DebugMode = EditorGUILayout.Toggle("DebugMode", DebugMode);
            EditorGUILayout.BeginHorizontal("Box");
            GUI.color = Color.grey;
            Header();
            GUI.color = Color.white;
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.BeginVertical();
            WindowBase();
            EditorGUILayout.EndVertical();
        }

        // Makes Base below header
        void WindowBase()
        {

            EditorGUILayout.BeginHorizontal();
            GUI.color = Color.yellow;
            TabButtonArea();
            GUI.color = Color.white;
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.BeginHorizontal();
            GUI.color = Color.grey;
            MainViewPort();
            GUI.color = Color.white;
            EditorGUILayout.EndHorizontal();
        }

        //Organizes our window layout
        void MainViewPort()
        {

            EditorGUILayout.BeginVertical("Box", GUILayout.Width(position.width / 3));
            ButtonListViewPort(selectionA);
            EditorGUILayout.EndVertical();

            EditorGUILayout.BeginVertical(GUILayout.Width(position.width - 20));
            ViewPortArea(selectionB);
            EditorGUILayout.EndVertical();
        }

        // Have categories if you like make it tabular at the top of your window under your header
        void TabButtonArea()
        {
            //See Below
        }

        //GUI that display's to the left of the ViewPortArea holding out sections list of buttons.
        // Each button changes what display's on ViewPortArea
        void ButtonListViewPort(int selection)
        {
            //See Below
        }

        //GUI that display's to the right of our list and below our tabs.
        void ViewPortArea(int selection)
        {
            //See Below
        }

        //GUI that display's at the very to of our window.
        void Header()
        {
            //See Below
        }


    #region ZeredaGames Methods

    #region Option A

    ///<summary>  Can be used for starting this instance.</summary>
    [MenuItem("Window/Editor Tools/ZeredaGames/Game Making Editor Tools/Open My Custom Editor Window Initialize A")]
        public static void StaticInitializeA()
        {
            EditorWindowTutorial window = (EditorWindowTutorial)EditorWindow.GetWindow(typeof(EditorWindowTutorial));
        }

        #endregion

        #region Option B
        
        // adjust 0 to organize the list 0 is top so in this scripts set up like is, will result in B, A, C
        [MenuItem("Window/Editor Tools/ZeredaGames/Game Making Editor Tools/Open My Custom Editor Window Initialize B", false, 0)]
        public static void StaticInitializeB()
        {
            window = GetWindow;
        }

        private static EditorWindowTutorial GetWindow
        {
            get
            {
                return (EditorWindowTutorial)EditorWindow.GetWindow(typeof(EditorWindowTutorial), true, "Editor Window Tutorial (Look you can Write w.e you like here!))");
            }
        }

        #endregion

        #region Option C

        [MenuItem("Window/Editor Tools/ZeredaGames/Game Making Editor Tools/Open My Custom Editor Window Initialize C", false, 2)]// adjust 0 to organize the list
        public static void StaticInitializeC()
        {
            window = GetWindowWithRect;
        }

        private static EditorWindowTutorial GetWindowWithRect
        {
            get
            {
                return (EditorWindowTutorial)EditorWindow.GetWindowWithRect(typeof(EditorWindowTutorial),new Rect(100,100,500,500), true, "Editor Window Tutorial (Look you can Write w.e you like here!))");
            }
        }

        #endregion

        public static bool UseA = true, UseB = false, UseC = false;

        public void Init()
        {
            if (UseA)
                StaticInitializeA();
            if (UseB)
                StaticInitializeB();
            if (UseC)
                StaticInitializeC();
            //Start writting here
        }

        public bool GetDebugMode
        {
            get
            {
                string message = PlayerPrefs.GetString("DebugMode");
                if (message == "true")
                {
                    DebugMode = true;
                    return DebugMode;
                }
                else {
                    DebugMode = false;
                    return DebugMode;
                }
            }
        }

        #endregion
    }
}

#endregion