Paul DiLascia, King William's Court Jester of Windows++ fame, wrote a tiny XUL motor for Windope Forms in C# dubbed Motlib. Motlib (http://motlib.net) shows how a bunch of XML tags break the Visual Studio generated spaghetti code lock-in.

 #region Visual Studio generated spaghetti code
 /// <summary>
 ///  required method for Visual Studio lock-in - do not dare
 ///  to touch this code by hand; always use the latest
 ///  and greatest Micropoly Milk Machine
 /// </summary>

 private void InitializeComponent()
 {
   this.mainMenu1 = new System.Windows.Forms.MainMenu();
   this.menuItem2 = new System.Windows.Forms.MenuItem();
   this.menuItem3 = new System.Windows.Forms.MenuItem();
   this.menuItem4 = new System.Windows.Forms.MenuItem();
   this.menuItem5 = new System.Windows.Forms.MenuItem();
   this.menuItem6 = new System.Windows.Forms.MenuItem();
   this.menuItem7 = new System.Windows.Forms.MenuItem();
   this.menuItem8 = new System.Windows.Forms.MenuItem();
   //
   // mainMenu1
   //
   this.mainMenu1.MenuItems.AddRange( new System.Windows.Forms.MenuItem[] {
     this.menuItem1,
     this.menuItem3});
   //
   // menuItem1
   //
   this.menuItem1.Index = 0;
   this.menuItem1.MenuItems.AddRange( new System.Windows.Forms.MenuItem[] {
     this.menuItem2});
   this.menuItem1.Text = "&File";
   ...
 }     

vs.

 <!-- feel free to change the XUL markup with 
      whatever text or XML editor you like     -->

 <mainmenu id="MondeMainMenu">
   <menuitem text="_File">
     <menuitem text="E_xit" />
    </menuitem>
    ...
 </mainmenu>

Read the full story entitled ".Net GUI Bliss: Streamline Your Code and Simplify Localization Using an XML GUI Language Parser" in the Micropoly Prawda November issue online at http://msdn.microsoft.com/msdnmag/issues/02/11/NETGUIBliss/

Paul DiLascia Quotes:

No human programmer would code this way, so why accept it from a mechanical one? A code generator is fundamentally a workaround for something that's missing. You can call it a wizard, but the wizard has no Brain.

GUI resources like menus and forms belong in files that are easily translated not embedded in procedural code instruction.

It's not hard to write a mini-XUL that supports only the widgets you need. XUL - or something like it - is just the ticket to GUI greatness!