menu_state_set menu_spec_variable mask ?pathname?
This command provides a combined interface to the menu_state_on and
menu_state_off functions. The name of the global variable containing
the menu specifications is passed over in the menu_spec_variable argument.
This must have been set by using the set_menu command.
If the mask value is positive the menu_state_on command is called
with this mask, otherwise the menu_state_off command is called with the
absolute value of the mask.
Pathname specifies the root location of the menu widgets as given to a
previous create_menus command.