This command is the same as the menu_state_off command except that menu
items with their disable set value ANDed with the mask are disabled.
Otherwise the menu item is left in the current state.
This page is maintained by
staden-package.
Last generated on 1 March 2001.
URL: http://www.mrc-lmb.cam.ac.uk/pubseq/manual/scripting_20.html