首先感谢网络上朋友们无私的共享,我才得以从一无所知到完美解决OCX开发中的问题,如果你也对OCX一窍不通,而需要在WEB客户端中操作第三方OCX,恰好第三方OCX又无法完全满足你的需求,那么这篇文章应该对你有所帮助,来吧。
1.创建一个MFC OCX工程
点击完成就ok了
现在你已经创建了一个OCX框架了,你想在WEB上应用吗?必须实现OCX安全机制,否则IE不会运行的,now,let go!
2.实现安全机制
在FIleView视图中,打开NewTestCtl.h文件,在public定义中插入如下代码
// 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
然后是TestfingerCtrl.CPP文件中IMPLEMENT_DYNCREATE(CTestfingerCtrl, COleControl)代码后面添加如下代码
// 去掉安全警告 BEGIN BEGIN_INTERFACE_MAP(CTestfingerCtrl, COleControl) INTERFACE_PART(CTestfingerCtrl, IID_IObjectSafety, ObjectSafety) END_INTERFACE_MAP() // Implementation of IObjectSafety STDMETHODIMP CTestfingerCtrl::XObjectSafety::GetInterfaceSafetyOptions( REFIID riid, DWORD __RPC_FAR *pdwSupportedOptions, DWORD __RPC_FAR *pdwEnabledOptions) { METHOD_PROLOGUE_EX(CTestfingerCtrl, 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 CTestfingerCtrl::XObjectSafety::SetInterfaceSafetyOptions( REFIID riid, DWORD dwOptionSetMask, DWORD dwEnabledOptions) { METHOD_PROLOGUE_EX(CTestfingerCtrl, 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) CTestfingerCtrl::XObjectSafety::AddRef() { METHOD_PROLOGUE_EX_(CTestfingerCtrl, ObjectSafety) return (ULONG)pThis->ExternalAddRef(); } STDMETHODIMP_(ULONG) CTestfingerCtrl::XObjectSafety::Release() { METHOD_PROLOGUE_EX_(CTestfingerCtrl, ObjectSafety) return (ULONG)pThis->ExternalRelease(); } STDMETHODIMP CTestfingerCtrl::XObjectSafety::QueryInterface(REFIID iid, LPVOID* ppvObj) { METHOD_PROLOGUE_EX_(CTestfingerCtrl, ObjectSafety) return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj); }
//去掉安全警告 END
好了,编译吧,这次IE中可以使用了,IE需要classid,打开VC6光盘的COMMON\TOOLS目录,运行OLEVIEW.EXE文件,查看controls下面newtest控件名字就得到classid了,下图是百度音乐的classid:3C294567-XXXXXXX
好了,基本的OCX框架有了,安全接口有了,下次该把第三方OCX集成进来了,做这个文章太累了,上传图片好麻烦,就不能简单点么?休息一下。