ActiveX控件开发，如何避免客户设置浏览器

如题，写了几个控件给网页调用，必须要去设置ie的受信任站点中的安全级别，一不小心设置变了的话，页面调用控件就会报错。比如（SCRIPT3: 找不到成员），以前碰到该错误的解决办法只能去将“对未标记为可安全执行脚本的ActiveX控件初始化并执行脚本”这一项设置为启用。

 新发现的办法，可在ActiveX工程中添加代码实现控件安全初始化，无需设置浏览器即可正常调用。具体操作：

1.xxxCtrl.h文件中

#include <ObjSafe.h>

class CxxxCtrl : public COleControl
{
	DECLARE_DYNCREATE(CxxxCtrl)

	/***ActiveX控件安全初始化：实现ISafeObject接口 开始***/
	DECLARE_INTERFACE_MAP()  
	BEGIN_INTERFACE_PART(ObjSafe, IObjectSafety)  
		STDMETHOD_(HRESULT, GetInterfaceSafetyOptions) (   
		/* [in] */ REFIID riid,  
		/* [out] */ DWORD __RPC_FAR *pdwSupportedOptions,  
		/* [out] */ DWORD __RPC_FAR *pdwEnabledOptions  
		);  
		STDMETHOD_(HRESULT, SetInterfaceSafetyOptions) (   
			/* [in] */ REFIID riid,  
			/* [in] */ DWORD dwOptionSetMask,  
			/* [in] */ DWORD dwEnabledOptions  
			);  
	END_INTERFACE_PART(ObjSafe);  
	/***ActiveX控件安全初始化：实现ISafeObject接口 结束***/
// 构造函数
public:
	CxxxCtrl();
......
}

2. xxxCtrl.cpp中，添加如下内容：

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

/***ActiveX控件安全初始化：实现ISafeObject接口 开始***/
// Interface map for IObjectSafety  
BEGIN_INTERFACE_MAP( CxxxCtrl, COleControl )  
	INTERFACE_PART(CxxxCtrl, IID_IObjectSafety, ObjSafe)  
END_INTERFACE_MAP()
// IObjectSafety member functions  
// Delegate AddRef, Release, QueryInterface  
ULONG FAR EXPORT CxxxCtrl::XObjSafe::AddRef()  
{  
	METHOD_PROLOGUE(CxxxCtrl, ObjSafe)  
		return pThis->ExternalAddRef();  
}  
ULONG FAR EXPORT CxxxCtrl::XObjSafe::Release()  
{  
	METHOD_PROLOGUE(CxxxCtrl, ObjSafe)  
		return pThis->ExternalRelease();  
}  
HRESULT FAR EXPORT CxxxCtrl::XObjSafe::QueryInterface(  
	REFIID iid, void FAR* FAR* ppvObj)  
{  
	METHOD_PROLOGUE(CxxxCtrl, ObjSafe)  
		return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);  
}  
const DWORD dwSupportedBits =   
	INTERFACESAFE_FOR_UNTRUSTED_CALLER |  
	INTERFACESAFE_FOR_UNTRUSTED_DATA;  
const DWORD dwNotSupportedBits = ~ dwSupportedBits;  
// CStopLiteCtrl::XObjSafe::GetInterfaceSafetyOptions  
// Allows container to query what interfaces are safe for what. We're  
// optimizing significantly by ignoring which interface the caller is  
// asking for.  
HRESULT STDMETHODCALLTYPE   
	CxxxCtrl::XObjSafe::GetInterfaceSafetyOptions(   
	/* [in] */ REFIID riid,  
	/* [out] */ DWORD __RPC_FAR *pdwSupportedOptions,  
	/* [out] */ DWORD __RPC_FAR *pdwEnabledOptions)  
{  
	METHOD_PROLOGUE(CxxxCtrl, ObjSafe)  
		HRESULT retval = ResultFromScode(S_OK);  
	// does interface exist?  
	IUnknown FAR* punkInterface;  
	retval = pThis->ExternalQueryInterface(&riid,   
		(void * *)&punkInterface);  
	if (retval != E_NOINTERFACE) { // interface exists  
		punkInterface->Release(); // release it--just checking!  
	}  
	// we support both kinds of safety and have always both set,  
	// regardless of interface  
	*pdwSupportedOptions = *pdwEnabledOptions = dwSupportedBits;  
	return retval; // E_NOINTERFACE if QI failed  
}  
// CStopLiteCtrl::XObjSafe::SetInterfaceSafetyOptions  
// Since we're always safe, this is a no-brainer--but we do check to make  
// sure the interface requested exists and that the options we're asked to  
// set exist and are set on (we don't support unsafe mode).  
HRESULT STDMETHODCALLTYPE   
	CxxxCtrl::XObjSafe::SetInterfaceSafetyOptions(   
	/* [in] */ REFIID riid,  
	/* [in] */ DWORD dwOptionSetMask,  
	/* [in] */ DWORD dwEnabledOptions)  
{  
	METHOD_PROLOGUE(CxxxCtrl, ObjSafe)  
		// does interface exist?  
		IUnknown FAR* punkInterface;  
	pThis->ExternalQueryInterface(&riid, (void * *)&punkInterface);  
	if (punkInterface) { // interface exists  
		punkInterface->Release(); // release it--just checking!  
	}  
	else { // interface doesn't exist  
		return ResultFromScode(E_NOINTERFACE);  
	}  
	// can't set bits we don't support  
	if (dwOptionSetMask & dwNotSupportedBits) {   
		return ResultFromScode(E_FAIL);  
	}  
	// can't set bits we do support to zero  
	dwEnabledOptions &= dwSupportedBits;  
	// (we already know there are no extra bits in mask )  
	if ((dwOptionSetMask & dwEnabledOptions) !=  
		dwOptionSetMask) {  
			return ResultFromScode(E_FAIL);  
	}          
	// don't need to change anything since we're always safe  
	return ResultFromScode(S_OK);  
}  
/***ActiveX控件安全初始化：实现ISafeObject接口 结束***/

IMPLEMENT_DYNCREATE(CxxxCtrl, COleControl)