OCX控件避免弹出安全警告的类

1 DECLARE_INTERFACE_MAP()
2     BEGIN_INTERFACE_PART(ObjectSafety, IObjectSafety)
3         STDMETHOD(GetInterfaceSafetyOptions)(REFIID riid, DWORD __RPC_FAR *pdwSupportedOptions, DWORD __RPC_FAR *pdwEnabledOptions);
4         STDMETHOD(SetInterfaceSafetyOptions)(REFIID riid, DWORD dwOptionSetMask, DWORD dwEnabledOptions);
5     END_INTERFACE_PART(ObjectSafety)

  1 BEGIN_INTERFACE_MAP(CVP2PCtrl, COleControl)
  2   INTERFACE_PART(CVP2PCtrl, IID_IObjectSafety, ObjectSafety)
  3 END_INTERFACE_MAP()
  4 // Implementation of IObjectSafety
  5 STDMETHODIMP CVP2PCtrl::XObjectSafety::GetInterfaceSafetyOptions(
  6    REFIID riid, 
  7    DWORD __RPC_FAR *pdwSupportedOptions, 
  8    DWORD __RPC_FAR *pdwEnabledOptions)
  9 {
 10  METHOD_PROLOGUE_EX(CVP2PCtrl, ObjectSafety)
 11 
 12  if (!pdwSupportedOptions || !pdwEnabledOptions)
 13  {
 14  return E_POINTER;
 15  }
 16 
 17  *pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA;
 18  *pdwEnabledOptions = 0;
 19 
 20  if (NULL == pThis->GetInterface(&riid))
 21  {
 22   TRACE("Requested interface is not supported.\n");
 23  return E_NOINTERFACE;
 24  }
 25 
 26  // What interface is being checked out anyhow?
 27  OLECHAR szGUID[39];
 28  int i = StringFromGUID2(riid, szGUID, 39);
 29 
 30  if (riid == IID_IDispatch)
 31  {
 32  // Client wants to know if object is safe for scripting
 33  *pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER;
 34  return S_OK;
 35  }
 36  else if (riid == IID_IPersistPropertyBag 
 37  || riid == IID_IPersistStreamInit
 38  || riid == IID_IPersistStorage
 39  || riid == IID_IPersistMemory)
 40  {
 41  // Those are the persistence interfaces COleControl derived controls support
 42  // as indicated in AFXCTL.H
 43  // Client wants to know if object is safe for initializing from persistent data
 44  *pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA;
 45  return S_OK;
 46  }
 47  else
 48  {
 49  // Find out what interface this is, and decide what options to enable
 50   TRACE("We didn't account for the safety of this interface, and it's one we support...\n");
 51  return E_NOINTERFACE;
 52  } 
 53 }
 54 
 55 STDMETHODIMP CVP2PCtrl::XObjectSafety::SetInterfaceSafetyOptions(
 56   REFIID riid, 
 57   DWORD dwOptionSetMask, 
 58   DWORD dwEnabledOptions)
 59 {
 60  METHOD_PROLOGUE_EX(CVP2PCtrl, ObjectSafety)
 61 
 62  OLECHAR szGUID[39];
 63  // What is this interface anyway?
 64  // We can do a quick lookup in the registry under HKEY_CLASSES_ROOT\Interface
 65  int i = StringFromGUID2(riid, szGUID, 39);
 66 
 67  if (0 == dwOptionSetMask && 0 == dwEnabledOptions)
 68  {
 69  // the control certainly supports NO requests through the specified interface
 70  // so it's safe to return S_OK even if the interface isn't supported.
 71  return S_OK;
 72  }
 73 
 74  // Do we support the specified interface?
 75  if (NULL == pThis->GetInterface(&riid))
 76  {
 77   TRACE1("%s is not support.\n", szGUID);
 78  return E_FAIL;
 79  }
 80 
 81  if (riid == IID_IDispatch)
 82  {
 83   TRACE("Client asking if it's safe to call through IDispatch.\n");
 84   TRACE("In other words, is the control safe for scripting?\n");
 85  if (INTERFACESAFE_FOR_UNTRUSTED_CALLER == dwOptionSetMask && INTERFACESAFE_FOR_UNTRUSTED_CALLER == dwEnabledOptions)
 86   {
 87  return S_OK;
 88   }
 89  else
 90   {
 91  return E_FAIL;
 92   }
 93  }
 94  else if (riid == IID_IPersistPropertyBag 
 95  || riid == IID_IPersistStreamInit
 96  || riid == IID_IPersistStorage
 97  || riid == IID_IPersistMemory)
 98  {
 99   TRACE("Client asking if it's safe to call through IPersist*.\n");
100   TRACE("In other words, is the control safe for initializing from persistent data?\n");
101 
102  if (INTERFACESAFE_FOR_UNTRUSTED_DATA == dwOptionSetMask && INTERFACESAFE_FOR_UNTRUSTED_DATA == dwEnabledOptions)
103   {
104  return NOERROR;
105   }
106  else
107   {
108  return E_FAIL;
109   }
110  }
111  else
112  {
113   TRACE1("We didn't account for the safety of %s, and it's one we support...\n", szGUID);
114  return E_FAIL;
115  }
116 }
117 
118 STDMETHODIMP_(ULONG) CVP2PCtrl::XObjectSafety::AddRef()
119 {
120  METHOD_PROLOGUE_EX_(CVP2PCtrl, ObjectSafety)
121  return (ULONG)pThis->ExternalAddRef();
122 }
123 
124 STDMETHODIMP_(ULONG) CVP2PCtrl::XObjectSafety::Release()
125 {
126  METHOD_PROLOGUE_EX_(CVP2PCtrl, ObjectSafety)
127  return (ULONG)pThis->ExternalRelease();
128 }