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コントロールを安全に設定するのに問題があります。どのように行う必要があるかを説明するこのスレッドを見つけました。私は説明したようにしました：

class myctrl: public COleControl, public IObjectSafetyImpl<myctrl,INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA>
{

次に、次を追加しました。

BEGIN_COM_MAP(myctrl)
    COM_INTERFACE_ENTRY(IObjectSafety)
END_COM_MAP()

「BEGIN_COM_MAP」が原因で問題が発生し、その理由がわかりません。「ロック」と「ロック解除」はmyctrlのメンバーではありません。それに関連するものは何も見つかりませんでした。これら2つのメンバーで何をする必要があるのか​​ 、エラーも発生します：

Error   3   error C2660: 'CCmdTarget::InternalQueryInterface' : function does not take 4 arguments
4

1 に答える 1

2

MFC COM の場合、COleControl派生クラスにボイラープレート コードを追加する必要があります。警告 - いくつかの大きなコピー/貼り付けがあるので、タイプミスを許してください!

まず、コントロールのヘッダー ファイルに次を追加します。

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)

次に、実装ファイルにこれを追加します

BEGIN_INTERFACE_MAP(myctrl, COleControl)
    INTERFACE_PART(myctrl, IID_IObjectSafety, ObjectSafety)
END_INTERFACE_MAP()

// Implementation of IObjectSafety
STDMETHODIMP myctrl::XObjectSafety::GetInterfaceSafetyOptions(
    REFIID riid,
    DWORD __RPC_FAR *pdwSupportedOptions,
    DWORD __RPC_FAR *pdwEnabledOptions)
{
    METHOD_PROLOGUE_EX(myctrl, 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 myctrl::XObjectSafety::SetInterfaceSafetyOptions(
    REFIID riid,
    DWORD dwOptionSetMask,
    DWORD dwEnabledOptions)
{
    METHOD_PROLOGUE_EX(myctrl, 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) myctrl::XObjectSafety::AddRef()
{
    METHOD_PROLOGUE_EX_(myctrl, ObjectSafety)
        return (ULONG)pThis->ExternalAddRef();
}
STDMETHODIMP_(ULONG) myctrl::XObjectSafety::Release()
{
    METHOD_PROLOGUE_EX_(myctrl, ObjectSafety)
        return (ULONG)pThis->ExternalRelease();
}
STDMETHODIMP myctrl::XObjectSafety::QueryInterface(
    REFIID iid, LPVOID* ppvObj)
{
    METHOD_PROLOGUE_EX_(myctrl, ObjectSafety)
        return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);
}
于 2013-06-04T07:28:41.580 に答える