add menu items programmatically to GtkMenuItemFactory

[Ray Clouse <ray clouse boeing com>]

I'm doing menus "the easy way" but I haven't found any examples/tutorials/docs
on how to add or change a menu item once a menu has been created.  For example,
I have the following menu:

{"/View/_Wingman's",          NULL,   0,              0, "<Branch>" },

I want to add menu items to this in my program when certain events occur.  How?

--
-------------------------------------------------------------------------
Ray Clouse                         |             Don't fear the penguins.
Engineer Scientist/Specialist      |
Boeing Expendable Launch Vehicles  |  Ray.Clouse AT boeing.com
Huntington Beach, CA               |  rclouse AT atdot.org