Repaint a system Editor window

Questions & Answers
1

How can a system Editor window like Build Settings be forced to repaint?

2

An internal system window can be repainted like this (Build Settings case, change the GetType string to repaint some other window):

var buildSettingsType = System.Type.GetType("UnityEditor.BuildPlayerWindow,UnityEditor");
var windows = Resources.FindObjectsOfTypeAll(buildSettingsType);
if (windows != null && windows.Length > 0)
{
    var window = (EditorWindow)windows[0];
    if (window)
        window.Repaint();
}