在使用extensions时都需要额外指定include、lib，例如笔者的VS11环境，右键项目 属性-->配置属性-->VC++目录在包含目录中添加F:\cocos2d-2.1beta3-x-2.1.1\extensions;以及在链接器-->命令行添加libextensions.lib或者使用代码添加

#pragma comment(lib, "libextensions.lib")

进入程序中需要将使用到的头文件写入，可以直接写#include “cocos-ext.h”(它包含了extensions的所有头文件引用)，然后添加命名空间声明：USING_NS_CC_EXT;

对于各种GUI控件可以在Samples的TestCpp的ExtensionsTest\ControlExtensionTest查看学习

下面这个代码参考了CCControlSwitchTest

#pragma once

#include "cocos2d.h"
#include "cocos-ext.h"

#pragma comment(lib, "libextensions.lib")

USING_NS_CC_EXT;

class HelpLayer : public cocos2d::CCLayer
{
public:
	HelpLayer(void);
	~HelpLayer(void);

	bool init();
	CREATE_FUNC(HelpLayer);

	cocos2d::CCLabelTTF *m_valueLabel;
	void valueChanged(cocos2d::CCObject *sender, CCControlEvent controlEvent);
};

#include "HelpLayer.h"

using namespace cocos2d;

HelpLayer::HelpLayer(void)
{
	m_valueLabel = NULL;
}

HelpLayer::~HelpLayer(void)
{
	CC_SAFE_RELEASE(m_valueLabel);
}

bool HelpLayer::init()
{
	bool bRet = false;
	do 
	{
		CC_BREAK_IF(!CCLayer::init());

		CCSize winSize = CCDirector::sharedDirector()->getWinSize();

		// switch controler
		CCControlSwitch *switchControl = CCControlSwitch::create
			(
				CCSprite::create("extensions/switch-mask.png"),
				CCSprite::create("extensions/switch-on.png"),
				CCSprite::create("extensions/switch-off.png"),
				CCSprite::create("extensions/switch-thumb.png"),
				CCLabelTTF::create("on", "Arial-BoldMT", 16),
				CCLabelTTF::create("off", "Arial-BoldMT", 16)
			);
		switchControl->setOn(true);
		switchControl->setPosition(ccp(winSize.width / 2 + 50, winSize.height / 2));
		this->addChild(switchControl);

		switchControl->addTargetWithActionForControlEvents(this, cccontrol_selector(HelpLayer::valueChanged), CCControlEventValueChanged);

		// button
		CCScale9Sprite *background = CCScale9Sprite::create("extensions/buttonBackground.png");
		background->setContentSize(CCSizeMake(80, 50));
		background->setPosition(ccp(winSize.width / 2 - 100, winSize.height / 2));
		this->addChild(background);

		m_valueLabel = CCLabelTTF::create("ON", "Marker Felt", 30);
		m_valueLabel->retain();
		m_valueLabel->setPosition(background->getPosition());
		this->addChild(m_valueLabel);

		bRet = true;
	} while (0);

	return bRet;
}

void HelpLayer::valueChanged(cocos2d::CCObject *sender, CCControlEvent controlEvent)
{
	CCControlSwitch *pSwitch = (CCControlSwitch*)sender;
	if (pSwitch->isOn())
	{
		m_valueLabel->setString("ON");
	}
	else
	{
		m_valueLabel->setString("OFF");
	}
}

程序运行如下：