VS 2008 MDI Child Text

I am using VB.NET (2008). I have a MDI form and a child form loads whenever I click on a menu item.In an MDI form if you click on Window menu, where you see options like Tile Horizontal, Cascade etc you also see the name of child forms which are open in that list. If you click any one of them then the focus shifts there.'Now the problem is if a child form changes its caption/text after it has been loaded and then you click on Window Menu it still shows the old text. If I open more than one child form and change one of the form's text and then click on another one and then open Window Menu then its okay.how can I refresh the list or do whatever so that if my mdi child form loads and its caption changes then it should be reflected in my mdi's form's window menu.