Unity Script Reference:

static function BeginHorizontal(params options: GUILayoutOption[]): void;

static void BeginHorizontal(params GUILayoutOption[] options);

static def BeginHorizontal(*options as GUILayoutOption[]) as void

static function BeginHorizontal(style: GUIStyle, params options: GUILayoutOption[]): void;

static void BeginHorizontal(GUIStyle style, params GUILayoutOption[] options);

static def BeginHorizontal(style as GUIStyle, *options as GUILayoutOption[]) as void

static function BeginHorizontal(text: string, style: GUIStyle, params options: GUILayoutOption[]): void;

static void BeginHorizontal(string text, GUIStyle style, params GUILayoutOption[] options);

static def BeginHorizontal(text as string, style as GUIStyle, *options as GUILayoutOption[]) as void

static function BeginHorizontal(image: Texture, style: GUIStyle, params options: GUILayoutOption[]): void;

static void BeginHorizontal(Texture image, GUIStyle style, params GUILayoutOption[] options);

static def BeginHorizontal(image as Texture, style as GUIStyle, *options as GUILayoutOption[]) as void

static function BeginHorizontal(content: GUIContent, style: GUIStyle, params options: GUILayoutOption[]): void;

static void BeginHorizontal(GUIContent content, GUIStyle style, params GUILayoutOption[] options);

static def BeginHorizontal(content as GUIContent, style as GUIStyle, *options as GUILayoutOption[]) as void

Parameters

text	Text to display on group.
image	Texture to display on group.
content	Text, image, and tooltip for this group.
style	The style to use for background image and padding values. If left out, the background is transparent.
options	An optional list of layout options that specify extra layouting properties. Any values passed in here will override settings defined by the `style`. See Also: GUILayout.Width, GUILayout.Height, GUILayout.MinWidth, GUILayout.MaxWidth, GUILayout.MinHeight, GUILayout.MaxHeight, GUILayout.ExpandWidth, GUILayout.ExpandHeight.

Description

Begin a Horizontal control group.

All controls rendered inside this element will be placed horiztonally next to each other. The group must be closed with a call to EndHorizontal.

Horizontal Layout.

	function OnGUI () {	
		// Starts a horizontal group
		GUILayout.BeginHorizontal ("box");
		GUILayout.Button ("I'm the first button");
		GUILayout.Button ("I'm to the right");
		
		GUILayout.EndHorizontal ();
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void OnGUI() {
        GUILayout.BeginHorizontal("box");
        GUILayout.Button("I'm the first button");
        GUILayout.Button("I'm to the right");
        GUILayout.EndHorizontal();
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def OnGUI() as void:
		GUILayout.BeginHorizontal('box')
		GUILayout.Button('I\'m the first button')
		GUILayout.Button('I\'m to the right')
		GUILayout.EndHorizontal()