Abdallah, I did some testing and debugging and found that while the menuitems under the 'File' menu created by PFC for the 'Most Recently Used' service can be manipulated, the menuitems under the 'Window' menu are not exposed and cannot be referenced in code. I hoped that it might use the 'Item' name like the PFC code above.
Using the "Item[]" property of the menu will enumerate the first 7 menuitems under the Window menu (Cascade, Tile Horizontal, Tile Vertical, Layer, -, Minimize All Windows, Undo), but any attempt to read the property array beyond that causes an array out-of-bounds error. The PB help even states that the Item[] property is not updated after "initialization". This, to me, implies that the window names appended to this menu are after "initialization", so are not accessible.
I did find another alternative which I will post below.
Thanks for the help.