Element: tree_window.popup
Element: tree_window.popupmenupane
The popup menupane associated with the exec procedure for tree_window. If the window has no procedure defined (window.exec) or if the procedure has no associated pulldown menu, this element has the value null.
The menupane structure contains details of the panels on the popup menu, i.e. buttons, labels, separators etc. Each item in the menubar is an individual panel member of the menupane.