appendPageMenu
Appends a page to @notebook, specifying the widget to use as the label in the popup menu.
Return
the index (starting from 0) of the appended page in the notebook, or -1 if function fails
Parameters
child
the GtkWidget to use as the contents of the page
tabLabel
the GtkWidget to be used as the label for the page, or null to use the default label, “page N”
menuLabel
the widget to use as a label for the page-switch menu, if that is enabled. If null, and @tab_label is a GtkLabel or null, then the menu label will be a newly created label with the same text as @tab_label; if @tab_label is not a GtkLabel, @menu_label must be specified if the page-switch menu is to be used.