由于项目需求,需要用到OCX控件。而在IE浏览器中加载OCX控件会有如下提示:
这是因为OCX控件有一个ID,而这个ID注册后IE不认为该OCX控件是安全的。所以,必须把这个控件注册为安全控件。
假设已经创建好OCX控件工程了。操作步骤如下:
第一步:在xxxApp类头文件(.h)添加如下函数声明。
// 去掉IE提示“此控件不安全的”提示框;
// Helper function to create a component category and associated
// description
HRESULT CreateComponentCategory(CATID catid, WCHAR* catDescription);
// Helper function to register a CLSID as belonging to a component
// category
HRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid);
// Helper function to unregister a CLSID as belonging to a component
// category
HRESULT UnRegisterCLSIDInCategory(REFCLSID clsid, CATID catid);
注意:这些函数声明不是xxxApp类成员函数声明,而是全局函数声明。
第二步:在xxxApp类的实现文件(.cpp)添加如下函数实现。
HRESULT CreateComponentCategory(CATID catid, WCHAR* catDescription)
{ICatRegister* pcr = NULL;HRESULT hr = S_OK;hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,NULL,CLSCTX_INPROC_SERVER,IID_ICatRegister,(void**)&pcr);if (FAILED(hr))return hr;// Make sure the HKCR/Component Categories/{..catid...}// key is registered
CATEGORYINFO catinfo;catinfo.catid = catid;catinfo.lcid = 0x0409; // english// Make sure the provided description is not too long.// Only copy the first 127 characters if it isint len = wcslen(catDescription);if (len > 127)len = 127;wcsncpy(catinfo.szDescription, catDescription, len);// Make sure the description is null terminatedcatinfo.szDescription[len] = '/0';hr = pcr->RegisterCategories(1, &catinfo);pcr->Release();return hr;
}HRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid)
{// Register your component categories information.ICatRegister* pcr = NULL;HRESULT hr = S_OK;hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,NULL,CLSCTX_INPROC_SERVER,IID_ICatRegister,(void**)&pcr);if (SUCCEEDED(hr)){// Register this category as being "implemented" by// the class.CATID rgcatid[1];rgcatid[0] = catid;hr = pcr->RegisterClassImplCategories(clsid, 1, rgcatid);}if (pcr != NULL)pcr->Release();return hr;
}HRESULT UnRegisterCLSIDInCategory(REFCLSID clsid, CATID catid)
{ICatRegister *pcr = NULL;HRESULT hr = S_OK;hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);if (SUCCEEDED(hr)){// Unregister this category as being "implemented" by the class.CATID rgcatid[1];rgcatid[0] = catid;hr = pcr->UnRegisterClassImplCategories(clsid, 1, rgcatid);}if (pcr != NULL)pcr->Release();return hr;
}
第三步:在xxxApp类的实现文件(xxx.cpp)定义两个GUID用来注册控件的安全性,同时需要定义要注册为安全的CLSID。
const CATID CATID_SafeForScripting = { 0x7dd95801, 0x9882, 0x11cf, { 0x9f, 0xa9, 0x00, 0xaa, 0x00, 0x6c, 0x42, 0xc4 } };
const CATID CATID_SafeForInitializing = { 0x7dd95802, 0x9882, 0x11cf, { 0x9f, 0xa9, 0x00, 0xaa, 0x00, 0x6c, 0x42, 0xc4 } };const CATID CLSID_SafeItem = { 0xedb3ce, 0xe6b9, 0x4883, { 0x83, 0xc0, 0x3f, 0xbb, 0x40, 0xf7, 0x58, 0x5f } };
两个GUID为CATID_SafeForScripting 、CATID_SafeForInitializing;安全的CLSID为CLSID_SafeItem。
在OCX控件注册完成后,在注册表的如下地方可以看到上面的两个GUID。
1)32位版本位置:
HKEY_CLASSES_ROOT\Wow6432Node\CLSID\[xxxCtrl类的uuid]\Implemented Categories,下面有这两个GUID。
2)64位版本位置:
HKEY_CLASSES_ROOT\CLSID\[xxxCtrl类的uuid]\Implemented Categories,下面有这两个GUID。
注意:[xxxCtrl类的uuid]是xxx.idl文件中xxxCtrl的类信息的uuid。
CLSID_SafeItem的值是根据在xxxCtrl类实现文件(xxxCtrl.cpp)中IMPLEMENT_OLECREATE_EX的定义而来的(实际上就是ActiveX的CLASSID)。IMPLEMENT_OLECREATE_EX值如下:
第四步:修改OCX控件的注册、反注册代码。
// DllRegisterServer - 将项添加到系统注册表
STDAPI DllRegisterServer(void)
{//AFX_MANAGE_STATE(_afxModuleAddrThis);//if (!AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid))// return ResultFromScode(SELFREG_E_TYPELIB);//if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))// return ResultFromScode(SELFREG_E_CLASS);//return NOERROR;//新注册代码
AFX_MANAGE_STATE(_afxModuleAddrThis);if (!AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid))return ResultFromScode(SELFREG_E_TYPELIB);if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))return ResultFromScode(SELFREG_E_CLASS);if (FAILED(CreateComponentCategory(CATID_SafeForScripting,L"Controls that are safely scriptable")))return ResultFromScode(SELFREG_E_CLASS);if (FAILED(CreateComponentCategory(CATID_SafeForInitializing,L"Controls safely initializable from persistent data")))return ResultFromScode(SELFREG_E_CLASS);if (FAILED(RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForScripting)))return ResultFromScode(SELFREG_E_CLASS);if (FAILED(RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForInitializing)))return ResultFromScode(SELFREG_E_CLASS);return NOERROR;
}// DllUnregisterServer - 将项从系统注册表中移除
STDAPI DllUnregisterServer(void)
{//AFX_MANAGE_STATE(_afxModuleAddrThis);//if (!AfxOleUnregisterTypeLib(_tlid, _wVerMajor, _wVerMinor))// return ResultFromScode(SELFREG_E_TYPELIB);//if (!COleObjectFactoryEx::UpdateRegistryAll(FALSE))// return ResultFromScode(SELFREG_E_CLASS);//return NOERROR;//新反注册代码
HRESULT hr;AFX_MANAGE_STATE(_afxModuleAddrThis);// Remove entries from the registry.hr = UnRegisterCLSIDInCategory(CLSID_SafeItem,CATID_SafeForInitializing);if (FAILED(hr))return hr;hr = UnRegisterCLSIDInCategory(CLSID_SafeItem,CATID_SafeForScripting);if (FAILED(hr))return hr;if (!AfxOleUnregisterTypeLib(_tlid, _wVerMajor, _wVerMinor))return ResultFromScode(SELFREG_E_TYPELIB);if (!COleObjectFactoryEx::UpdateRegistryAll(FALSE))return ResultFromScode(SELFREG_E_CLASS);return NOERROR;
}
至此完成了注册安全性的OCX控件。