GtkNotebook::set_show_border
void set_show_border(bool show_border);
Sets whether or not a beveled edge will be drawn around the notebook
pages. If show_border is false
the border will not be shown. Setting the border to be shown when the
border is already showing or setting it to be hidden when the border is
already hidden has no effect. This only has an effect when tabs are not shown.
See also: set_show_tabs()
