C++开发浏览器插件ActiveX（一）

注意：创建MFC ActiveX Control时已经自动给项目添加了.def文件并做好了相应关联。若对配置信息更改后导致编译的ocx注册不成功或提示找不到EntryPoint，可以检查一下Linker->Input的Module Definition File是否配置正确，正常情况下已经自动配置好了，如下图：

#include "comcat.h"// 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// categoryHRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid);// HRESULT UnRegisterCLSIDInCategory - Remove entries from the registry 
HRESULT UnRegisterCLSIDInCategory(REFCLSID clsid, CATID catid);

#include "stdafx.h"#include "comcat.h"#include "strsafe.h"#include "objsafe.h"// HRESULT CreateComponentCategory - Used to register ActiveX control as safe 
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    size_t len;    // Make sure the provided description is not too long.    // Only copy the first 127 characters if it is.    // The second parameter of StringCchLength is the maximum    // number of characters that may be read into catDescription.    // There must be room for a NULL-terminator. The third parameter    // contains the number of characters excluding the NULL-terminator.hr = StringCchLength(catDescription, STRSAFE_MAX_CCH, &len);    if (SUCCEEDED(hr))        {        if (len>127)          {            len = 127;          }        }       else        {          // TODO: Write an error handler;        }    // The second parameter of StringCchCopy is 128 because you need     // room for a NULL-terminator.hr = StringCchCopy(catinfo.szDescription, len + 1, catDescription);    // Make sure the description is null terminated.catinfo.szDescription[len + 1] = '\0';     hr = pcr->RegisterCategories(1, &catinfo);    pcr->Release();     return hr;} // HRESULT RegisterCLSIDInCategory -//      Register your component categories information 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 - Remove entries from the registry 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;}

// DllRegisterServer - Adds entries to the system registrySTDAPI DllRegisterServer(void){    HRESULT hr;    // HResult used by Safety Functions     AFX_MANAGE_STATE(_afxModuleAddrThis);     if (!AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid))      return ResultFromScode(SELFREG_E_TYPELIB);     if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))      return ResultFromScode(SELFREG_E_CLASS);     // Mark the control as safe for initializing.                                                 hr = CreateComponentCategory(CATID_SafeForInitializing,          L"Controls safely initializable from persistent data!");    if (FAILED(hr))      return hr;     hr = RegisterCLSIDInCategory(CLSID_SafeItem,          CATID_SafeForInitializing);    if (FAILED(hr))        return hr;     // Mark the control as safe for scripting.     hr = CreateComponentCategory(CATID_SafeForScripting,                                  L"Controls safely  scriptable!");    if (FAILED(hr))        return hr;     hr = RegisterCLSIDInCategory(CLSID_SafeItem,                         CATID_SafeForScripting);    if (FAILED(hr))        return hr;     return NOERROR;}// DllUnregisterServer - Removes entries from the system registrySTDAPI DllUnregisterServer(void){    AFX_MANAGE_STATE(_afxModuleAddrThis);      // 删除控件初始化安全入口.   HRESULT hr=UnRegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForInitializing);      if (FAILED(hr))          return hr;      // 删除控件脚本安全入口   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;}