Vertical slider widget for selecting a value from a range.
A GtkVScale is a vertical scrollbar-like widget that is able to display its adjustment value as text.
There are some configuration issues with this widget when it is used in such a way; please refer to GtkScale for further information.
-- Creates a vertical slider.GtkVScale::new_with_range (double min, double max, double step);-- Creates a vertical slider with specified range.