GUISkin.button

Description

Style used by default for GUI.Button controls.

    // Modifies only the button style of the current GUISkin

    var style : GUIStyle;

    function OnGUI() {
        GUI.skin.button = style;
        GUILayout.Button("This is a button.");
    }

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public GUIStyle style;
    void OnGUI() {
        GUI.skin.button = style;
        GUILayout.Button("This is a button.");
    }
}