更改组件的绑定

网络配置子系统始终通知通知通知对象绑定中影响通知对象的网络组件的更改。 子系统调用 notify 对象的 INetCfgComponentNotifyBinding：：NotifyBindingPath 方法，并传递一个值，该值指定更改以及指向更改所涉及的绑定路径的 INetCfgBindingPath 接口的指针。 如果子系统传递NCN_DISABLE禁用通知对象的网络组件与特定网络卡共享的绑定路径，则 notify 对象可以激活与其他网络卡绑定，如以下代码所示。

HRESULT CSample::NotifyBindingPath(DWORD dwChangeFlag,
        INetCfgBindingPath* pncbp1)
{
    INetCfgComponent *pnccLow;
    INetCfgComponentBindings *pncbind;
    IEnumNetCfgBindingPath *penumncbp;
    INetCfgBindingPath *pncbp2;
    IEnumNetCfgBindingInterface *penumncbi;
    INetCfgBindingInterface *pncbi;
    DWORD dwFlags = EBP_BELOW;
    ULONG celt = 1; // Request one enumeration element. 
    HRESULT hr = S_OK;
    // Retrieve bindings for the notify object's component (m_pncc)
    hr = m_pncc->QueryInterface(IID_INetCfgComponentBindings, 
                                (LPVOID*)&pncbind);
    // Determine if notification is about disabling a binding path.
    if (SUCCEEDED(hr) && (NCN_DISABLE & dwChangeFlag)) {
        // Retrieve enumerator for binding paths for the component.
        hr = pncbind->EnumBindingPaths(dwFlags, &penumncbp);
        // Reset the sequence and retrieve a binding path.
        hr = penumncbp->Reset();
        hr = penumncbp->Next(celt, &pncbp2, NULL);
        // Ensure the binding path is different.
        do {
            if (pncbp1 != pncbp2) break;
   hr = penumncbp->Skip(celt); // skip one element
            hr = penumncbp->Next(celt, &pncbp2, NULL);
        } while (SUCCEEDED(hr));
        if (SUCCEEDED(hr)) {
            // Retrieve enumerator for interfaces of the binding path.
            hr = pncbp2->EnumBindingInterfaces(&penumncbi);
            // Retrieve a binding interface for the binding path.
            hr = penumncbi->Next(celt, &pncbi, NULL);
            // Retrieve the lower network component.
            hr = pncbi->GetLowerComponent(&pnccLow);
            // If the component is a physical network card and binding 
            // is currently disabled, enable binding.
            DWORD dwcc;
            hr = pnccLow->GetCharacteristics(&dwcc);
            if (SUCCEEDED(hr) && (dwcc & NCF_PHYSICAL)) {
                hr = pncbp2->IsEnabled(); // S_FALSE for disabled
                if (hr == S_FALSE)  hr = pncbp2->Enable(TRUE);
            }
        }
        else return hr;
    }
    return hr;
}