class CMyApp : public CWinApp
{
private:
	friend class CHotKeyManager& GetHotKeyManager();

	static CHotKeyManager	m_hotkeyManager;

...
};

CHotKeyManager CMyApp::m_hotkeyManager;

CHotKeyManager& GetHotKeyManager()
{
	return CMyApp::m_hotkeyManager;
}

GetHotKeyManager().DoSomeStuff();

class CHotKeyManager
{
public:
	int getKeyHeight();
	int getKeyWidth();
};

class CTestHotKeyFriendFunction
{
private:
	friend class CHotKeyManager& GetHotKeyManager();

	static CHotKeyManager	m_hotkeyManager;
};

CHotKeyManager CTestHotKeyFriendFunction::m_hotkeyManager;

CHotKeyManager& GetHotKeyManager()
{
	return CTestHotKeyFriendFunction::m_hotkeyManager;
}

static void testUsingFriendFunc()
{
	GetHotKeyManager()|;
}