在此页上的 ActiveX 控件和本页上的其它部份的交互可能不安全

在EOS6的项目中，如果采用VC++开发的ActiveX，那么第一次运行的时候，IE中就会提示，“在此页上的ActiveX控件和本 页上的其他部分的交互可能不安全，你想允许这种交互吗？”在网上找了很多资料，原理介绍的多，但是真正如何做，介绍的比较少，因此这里把实际的步骤一步一 步的记录下来了，供大家参考。
1.1 去除ActiveX访问时的安全提示
当ActiveX第一次被访问时，会出现如下提示框：

这是IE浏览器的安全机制造成的，我们可以采用下面的步骤来去除这个提示信息：
1.1.1 在CDemoCtl的头文件.h中增加对objsave的引用
#include <objsafe.h>
1.1.2 在其protected声明区增加如下内容：
//去掉安全警告 BEGIN
DECLARE_INTERFACE_MAP()
BEGIN_INTERFACE_PART(ObjectSafety, IObjectSafety)
STDMETHOD(GetInterfaceSafetyOptions)(REFIID riid, DWORD __RPC_FAR *pdwSupportedOptions, DWORD __RPC_FAR *pdwEnabledOptions);
STDMETHOD(SetInterfaceSafetyOptions)(REFIID riid, DWORD dwOptionSetMask, DWORD dwEnabledOptions);
END_INTERFACE_PART(ObjectSafety)
//去掉安全警告 END
1.1.3 在CDemoCtl的实现类.cpp的IMPLEMENT_DYNCREATE(CActivexFirstCtrl, COleControl)这一行后增加如下内容：
//去掉安全警告 BEGIN
BEGIN_INTERFACE_MAP(CHJFaceActiveCtrl, COleControl)
    INTERFACE_PART(CHJFaceActiveCtrl, IID_IObjectSafety, ObjectSafety)
END_INTERFACE_MAP()

// Implementation of IObjectSafety
STDMETHODIMP CHJFaceActiveCtrl::XObjectSafety::GetInterfaceSafetyOptions(
REFIID riid,
DWORD __RPC_FAR *pdwSupportedOptions,
DWORD __RPC_FAR *pdwEnabledOptions)
{
    METHOD_PROLOGUE_EX(CHJFaceActiveCtrl, ObjectSafety)
    if (!pdwSupportedOptions || !pdwEnabledOptions)
    {
        return E_POINTER;
    }
    *pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA;
    *pdwEnabledOptions = 0;
    if (NULL == pThis->GetInterface(&riid))
    {
        TRACE("Requested interface is not supported.\n");
        return E_NOINTERFACE;
    }
    // What interface is being checked out anyhow?
    OLECHAR szGUID[39];
    int i = StringFromGUID2(riid, szGUID, 39);
    if (riid == IID_IDispatch)
    {
        // Client wants to know if object is safe for scripting
        *pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER;
        return S_OK;
    }
    else if (riid == IID_IPersistPropertyBag
    || riid == IID_IPersistStreamInit
    || riid == IID_IPersistStorage
    || riid == IID_IPersistMemory)
    {
        // Those are the persistence interfaces COleControl derived controls support
        // as indicated in AFXCTL.H
        // Client wants to know if object is safe for initializing from persistent data
        *pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA;
        return S_OK;
    }
    else
    {
        // Find out what interface this is, and decide what options to enable
        TRACE("We didn't account for the safety of this interface, and it's one we support...\n");
        return E_NOINTERFACE;
    }
}

STDMETHODIMP CHJFaceActiveCtrl::XObjectSafety::SetInterfaceSafetyOptions(
REFIID riid,
DWORD dwOptionSetMask,
DWORD dwEnabledOptions)
{
    METHOD_PROLOGUE_EX(CHJFaceActiveCtrl, ObjectSafety)
    OLECHAR szGUID[39];
    // What is this interface anyway?
    // We can do a quick lookup in the registry under HKEY_CLASSES_ROOT\Interface
    int i = StringFromGUID2(riid, szGUID, 39);
    if (0 == dwOptionSetMask && 0 == dwEnabledOptions)
    {
        // the control certainly supports NO requests through the specified interface
        // so it"s safe to return S_OK even if the interface isn"t supported.
        return S_OK;
    }
    // Do we support the specified interface?
    if (NULL == pThis->GetInterface(&riid))
    {
        TRACE1("%s is not support.\n", szGUID);
        return E_FAIL;
    }
    if (riid == IID_IDispatch)
    {
        TRACE("Client asking if it's safe to call through IDispatch.\n");
        TRACE("In other words, is the control safe for scripting?\n");
        if (INTERFACESAFE_FOR_UNTRUSTED_CALLER == dwOptionSetMask && INTERFACESAFE_FOR_UNTRUSTED_CALLER == dwEnabledOptions)
        {
            return S_OK;
        }
        else
        {
            return E_FAIL;
        }
    }
    else if (riid == IID_IPersistPropertyBag
    || riid == IID_IPersistStreamInit
    || riid == IID_IPersistStorage
    || riid == IID_IPersistMemory)
    {
        TRACE("Client asking if it's safe to call through IPersist*.\n");
        TRACE("In other words, is the control safe for initializing from persistent data?\n");
        if (INTERFACESAFE_FOR_UNTRUSTED_DATA == dwOptionSetMask && INTERFACESAFE_FOR_UNTRUSTED_DATA == dwEnabledOptions)
        {
            return NOERROR;
        }
        else
        {
            return E_FAIL;
        }
    }
    else
    {
        TRACE1("We didn't account for the safety of %s, and it's one we support...\n", szGUID);
        return E_FAIL;
    }
}
STDMETHODIMP_(ULONG) CHJFaceActiveCtrl::XObjectSafety::AddRef()
{
    METHOD_PROLOGUE_EX_(CHJFaceActiveCtrl, ObjectSafety)
    return (ULONG)pThis->ExternalAddRef();
}
STDMETHODIMP_(ULONG) CHJFaceActiveCtrl::XObjectSafety::Release()
{
    METHOD_PROLOGUE_EX_(CHJFaceActiveCtrl, ObjectSafety)
    return (ULONG)pThis->ExternalRelease();
}
STDMETHODIMP CHJFaceActiveCtrl::XObjectSafety::QueryInterface(REFIID iid, LPVOID* ppvObj)
{
    METHOD_PROLOGUE_EX_(CHJFaceActiveCtrl, ObjectSafety)
    return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);
}
//去掉安全警告 END