GtkHScale a horizontal slider widget for selecting a value from a range. The #GtkHScale widget is used to allow the user to select a value using a horizontal slider. To create one, use gtk_hscale_new_with_range(). The position to show the current value, and the number of decimal places shown can be set using the parent #GtkScale class's functions. The #GtkHScale-struct struct contains private data only, and should be accessed using the functions below. Creates a new #GtkHScale. @adjustment: the #GtkAdjustment which sets the range of the scale. @Returns: a new #GtkHScale.