[PreserveSig]
        int EnumObjects(IntPtr hWnd, SHCONTF flags, out IntPtr enumIDList);

//循环查找 C 盘下面的文件/文件夹的 PIDL
            IEnumIDList fileEnum = null;
            IEnumIDList folderEnum = null;
            IntPtr fileEnumPtr = IntPtr.Zero;
            IntPtr folderEnumPtr = IntPtr.Zero;
            IntPtr pidlSub;
            int celtFetched;

            //获取子文件夹
            if (Root.EnumObjects(this.Handle, SHCONTF.FOLDERS | SHCONTF.INCLUDEHIDDEN, out fileEnumPtr) == API.S_OK)
            ...{
                fileEnum = (IEnumIDList)Marshal.GetObjectForIUnknown(fileEnumPtr);
                while (fileEnum.Next(1, out pidlSub, out celtFetched) == 0 && celtFetched == API.S_FALSE)
                ...{
                    //获取显示名称
                    string name = API.GetNameByPIDL(pidlSub);
                    lvFile.Items.Add(name, 1);
                }
            }

            //获取子文件
            if (Root.EnumObjects(this.Handle, SHCONTF.NONFOLDERS | SHCONTF.INCLUDEHIDDEN, out folderEnumPtr) == API.S_OK)
            ...{
                folderEnum = (IEnumIDList)Marshal.GetObjectForIUnknown(folderEnumPtr);
                while (folderEnum.Next(1, out pidlSub, out celtFetched) == 0 && celtFetched == API.S_FALSE)
                ...{
                    string name = API.GetNameByPIDL(pidlSub);
                    lvFile.Items.Add(name, 0);
                }
            }