The Tk commands tk_menuBar and tk_bindForTraversal commands are implemented in the obsolete.tcl file in the Tk package, documented as procs that people should no longer be using, but which are being kept around for backwards compatibility.
Previously the invocation of this Tk command is tk_menuBar. Apparently because these are obsolete, they are no longer being documented.
See docs at http://incrtcl.sourceforge.net/iwidgets/iwidgets/menubar.html
Anyone have a discussion of what a menubar should be?
[What to say about
. config -menu [menu m]
?
imEdit has example ... ]
Tk syntax help - Arts and crafts of Tcl-Tk programming - Category Command, a part of the Tk package