编写在浏览器中不弹出警告的ActiveX控件

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我们在编写ActiveX控件时，如果用在浏览器中，经常都会弹出现在运行的脚本不安全的提示， 如果给客户使用，将会带来极大不便。按照MSDN的介绍通常有两种一种是实现IObjectSafe接口，一种是通过修改注册表的方法。一般如果用ATL开发ActiveX控件，就用实现ObjectSafe接口的方法。如果用MFC开发，我觉得还是用修改注册表的方法比较方便。下面我们将第二种方法：

要包括两个文件

#include "comcat.h"
#include "Objsafe.h"

// 本控件的CLSID,注册表用

const GUID CDECL CLSID_SafeItem =
  { 0x7AE7497B, 0xCAD8, 0x4E66, { 0xA5,0x8B,0xDD,0xE9,0xBC,0xAF,0x6B,0x61 } };

// 创建组件种类

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 is.
    int len = wcslen(catDescription);
    if (len>127)
        len = 127;
    wcsncpy(catinfo.szDescription, catDescription, len);
    // Make sure the description is null terminated.
    catinfo.szDescription[len] = ''\0'';

    hr = pcr->RegisterCategories(1, &catinfo);
        pcr->Release();

    return hr;
}

// 注册组件种类

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;
}

// 卸载组件种类

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 registry

STDAPI DllRegisterServer(void)
{
 HRESULT hr;

 AFX_MANAGE_STATE(_afxModuleAddrThis);

 if (!AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid))
  return ResultFromScode(SELFREG_E_TYPELIB);

 if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))
  return ResultFromScode(SELFREG_E_CLASS);

    // 标记控件初始化安全.
    // 创建初始化安全组件种类
    hr = CreateComponentCategory(CATID_SafeForInitializing, L"Controls safely initializable from persistent data!");
    if (FAILED(hr))
        return hr;
    // 注册初始化安全
    hr = RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForInitializing);
    if (FAILED(hr))
        return hr;

    // 标记控件脚本安全
    // 创建脚本安全组件种类 
    hr = CreateComponentCategory(CATID_SafeForScripting, L"Controls safely scriptable!");
    if (FAILED(hr))
        return hr;
    // 注册脚本安全组件种类
    hr = RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForScripting);
    if (FAILED(hr))
        return hr;

 return NOERROR;
}

// DllUnregisterServer - Removes entries from the system registry

STDAPI DllUnregisterServer(void)
{
 HRESULT hr;

 AFX_MANAGE_STATE(_afxModuleAddrThis);

 if (!AfxOleUnregisterTypeLib(_tlid, _wVerMajor, _wVerMinor))
  return ResultFromScode(SELFREG_E_TYPELIB);

 if (!COleObjectFactoryEx::UpdateRegistryAll(FALSE))
  return ResultFromScode(SELFREG_E_CLASS);

    // 删除控件初始化安全入口.
    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;

//////////////////////////
 return NOERROR;
}

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