Unity Script Reference:

static function VerticalSlider(position: Rect, value: float, topValue: float, bottomValue: float): float;

static function VerticalSlider(position: Rect, value: float, topValue: float, bottomValue: float, slider: GUIStyle, thumb: GUIStyle): float;

Parameters

position	Rectangle on the screen to use for the slider.
value	The value the slider shows. This determines the position of the draggable thumb.
topValue	The value at the top end of the slider.
bottomValue	The value at the bottom end of the slider.
slider	The GUIStyle to use for displaying the dragging area. If left out, the `horizontalSlider` style from the current GUISkin is used.
thumb	The GUIStyle to use for displaying draggable thumb. If left out, the `horizontalSliderThumb` style from the current GUISkin is used.

Returns
float The value that has been set by the user.

Description

A vertical slider the user can drag to change a value between a min and a max.

	// Draws a vertical slider control that goes from  10 (top) to 0 (bottom)
	var vSliderValue : float = 0.0;	function OnGUI () {
		vSliderValue = GUI.VerticalSlider (Rect (25, 25, 100, 30), vSliderValue, 10.0, 0.0);
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public float vSliderValue = 0.0F;
    void OnGUI() {
        vSliderValue = GUI.VerticalSlider(new Rect(25, 25, 100, 30), vSliderValue, 10.0F, 0.0F);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public vSliderValue as float = 0.0F

	def OnGUI() as void:
		vSliderValue = GUI.VerticalSlider(Rect(25, 25, 100, 30), vSliderValue, 10.0F, 0.0F)