使用优雅的方式自定义程序加载的flash插件

非HOOK方式替换FLASH模块

typedef HRESULT (STDCALL * fnDllGetClassObject)(REFCLSID rclsid, REFIID riid, LPVOID * ppvObj);
class CustomFlash
{
	DWORD m_dwCookie;
	CLSID m_clsid;
	CComPtr<IClassFactory> m_spFactory;
	HINSTANCE m_mod;

public:
	CustomFlash() : m_dwCookie(0), m_mod(NULL)
	{
		//
	}

	~CustomFlash()
	{
		UnInit();
	}

	BOOL Init(LPCWSTR lpszOcx)
	{
		if (m_dwCookie == 0)
		{
			m_mod = ::CoLoadLibrary((LPOLESTR)lpszOcx, FALSE);
			if (m_mod == NULL) return UnInit(), FALSE;

			HRESULT hr = CLSIDFromProgID(L"ShockwaveFlash.ShockwaveFlash", &m_clsid);
			if (FAILED(hr)) return UnInit(), FALSE;

			fnDllGetClassObject fn = (fnDllGetClassObject)::GetProcAddress(m_mod, "DllGetClassObject");
			if (fn == NULL) return UnInit(), FALSE;

			hr = fn(m_clsid, IID_IClassFactory, (LPVOID*)&m_spFactory.p);
			if (FAILED(hr)) return UnInit(), FALSE;

			hr = ::CoRegisterClassObject(m_clsid, m_spFactory.p, CLSCTX_INPROC_SERVER, REGCLS_MULTIPLEUSE, &m_dwCookie);
			if (FAILED(hr)) return UnInit(), FALSE;

			return TRUE;
		}
		return FALSE;
	}

	void UnInit()
	{
		if (m_dwCookie)
		{
			HRESULT hr = ::CoRevokeClassObject(m_dwCookie);
			m_dwCookie = 0;
		}

		m_spFactory = NULL;

		if (m_mod)
		{
			::CoFreeLibrary(m_mod);
			m_mod = NULL;
		}
	}
};

CustomFlash g_customFlash; // 创建全局变量

// 在HOOK的地方，直接调用g_customFlash.Init(L"...\flash.ocx"); 即可完成替换