如何从WPD API获取设备的根目录？

#include <windows.h>
#include <PortableDeviceApi.h>
#include <PortableDevice.h>

int main()
{
    // 初始化WPD API
    CoInitialize(NULL);

    // 创建WPD管理器对象
    IPortableDeviceManager* pDeviceManager = NULL;
    CoCreateInstance(CLSID_PortableDeviceManager, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pDeviceManager));

    // 枚举设备
    IEnumPortableDevice* pEnumDevices = NULL;
    pDeviceManager->EnumDevices(0, &pEnumDevices);

    // 获取第一个设备
    IPortableDevice* pDevice = NULL;
    pEnumDevices->Next(1, &pDevice, NULL);

    // 获取设备根存储对象
    IPortableDeviceContent* pDeviceContent = NULL;
    pDevice->Open(&pDeviceContent);

    IPortableDeviceProperties* pDeviceProperties = NULL;
    pDeviceContent->Properties(&pDeviceProperties);

    IPortableDeviceValues* pValues = NULL;
    pDeviceProperties->GetValues(L"WPD_DEVICE_OBJECT_ID", NULL, &pValues);

    LPWSTR pszRootObjectID = NULL;
    pValues->GetStringValue(L"WPD_DEVICE_OBJECT_ID", &pszRootObjectID);

    IPortableDeviceContent2* pDeviceContent2 = NULL;
    pDeviceContent->QueryInterface(IID_PPV_ARGS(&pDeviceContent2));

    IPortableDeviceObject* pRootObject = NULL;
    pDeviceContent2->GetObject(pszRootObjectID, &pRootObject);

    // 获取根目录路径
    LPWSTR pszRootPath = NULL;
    pRootObject->GetPath(&pszRootPath);

    // 打印根目录路径
    wprintf(L"设备的根目录路径：%s\n", pszRootPath);

    // 释放资源
    CoTaskMemFree(pszRootPath);
    CoTaskMemFree(pszRootObjectID);
    pRootObject->Release();
    pDeviceContent2->Release();
    pValues->Release();
    pDeviceProperties->Release();
    pDeviceContent->Release();
    pDevice->Release();
    pEnumDevices->Release();
    pDeviceManager->Release();

    // 反初始化WPD API
    CoUninitialize();

    return 0;
}