Vince,

the problem is caused be the menu "Window" and the item "Hide".
The only way to get rid of these blank extra options is to exclude
the "Hide" option. "Hide" is not very useful anyway.

The internal option name is: _mwi_hide
_mwi_hide (Hide Window)

You have to use your own menu (not system menu) in your application.
In your own menu you can include all necessary system menu
options by using MS short names like: _med_undo, _med_cut
(complete list can be found in help file).
DEFINE BAR _med_undo OF ...
If you exclude _mwi_hide you will prevent getting blank items.

Andreas