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CloseCreateGUI is called when the EditorWindow's rootVisualElement is ready to be populated.
Use CreateGUI to add UIToolkit user interface elements to your window.
// The window appears in front of the Editor. // The window shows the type of a Unity object the cursor is over. using UnityEngine; using UnityEditor; using UnityEngine.UIElements; public class MouseOverWindowExample : EditorWindow { string mouseOver = "Nothing..."; Label label; [MenuItem("Examples/Mouse Over Example")] static void Init() { GetWindow<MouseOverWindowExample>("mouseOver"); } void CreateGUI() { label = new Label($"Mouse over: {mouseOver}"); rootVisualElement.Add(label); } void Update() { label.schedule.Execute(() => { mouseOver = EditorWindow.mouseOverWindow ? EditorWindow.mouseOverWindow.ToString() : "Nothing..."; label.text = $"Mouse over: {mouseOver}"; }).Every(10); } }