驱动读取注册表问题，帮忙解决一下。

怎么注册表读取显示出来只有一位？？？

UNICODE_STRING uPath, uName, uResult;
ANSI_STRING aResult;
HANDLE hFolder = NULL;
OBJECT_ATTRIBUTES objAttribs;
NTSTATUS status = STATUS_SUCCESS;
ULONG dataLength = 0x80;
ULONG structLength = sizeof(KEY_VALUE_BASIC_INFORMATION) + dataLength + sizeof(UNICODE_NULL);
PKEY_VALUE_BASIC_INFORMATION pBasicValue = NULL;
PKEY_VALUE_PARTIAL_INFORMATION pPartialValue = NULL;
PKEY_VALUE_FULL_INFORMATION pFullValue = NULL;
pBasicValue = (PKEY_VALUE_BASIC_INFORMATION) ExAllocatePool(PagedPool, structLength);
pPartialValue = (PKEY_VALUE_PARTIAL_INFORMATION) ExAllocatePool(PagedPool, structLength);
pFullValue = (PKEY_VALUE_FULL_INFORMATION) ExAllocatePool(PagedPool, structLength);


RtlInitUnicodeString(&uPath, L"\\Registry\\Machine\\Software\\XXXXX" );
RtlInitUnicodeString(&uName, L"XXXX");

InitializeObjectAttributes(&objAttribs, &uPath, OBJ_CASE_INSENSITIVE, NULL, NULL);

status = ZwOpenKey(&hFolder, KEY_READ, &objAttribs);

if(status != STATUS_SUCCESS)
{
      DbgPrint("Couldn't open key. Ending function.\n");
      return status;
}

memset(pPartialValue, 0, structLength);
status = ZwQueryValueKey(hFolder, &uName, KeyValuePartialInformation, pPartialValue, structLength, &dataLength);

switch(status)
{
case STATUS_INVALID_HANDLE: //Always end up here.
      DbgPrint("ZwQueryValueKey(Partial) says the handle is bogus.\n");
      break;
case STATUS_BUFFER_OVERFLOW:
      DbgPrint("Buffer overflow error");
      if(status != STATUS_SUCCESS)
      {
            DbgPrint("ZwQueryValueKey(Partial): Still didn't get it."\
                        " Status: %X\n", status);
            break;
      }
      //Fall Through
case STATUS_SUCCESS:
      DbgPrint("Success");

DbgPrint(pPartialValue->Data);      //只有一位?????????????


}
ExFreePool(pPartialValue);