如何获取线程上下文？ （ctypes - ＆＃34; WindowsError：[错误126]＆＃34;）

Question

>>> import ctypes
>>> ctypes.windll.context()
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "D:\Program Files\python27\lib\ctypes\__init__.py", line 435, in __getattr__
    dll = self._dlltype(name)
  File "D:\Program Files\python27\lib\ctypes\__init__.py", line 365, in __init__
    self._handle = _dlopen(self._name, mode)
WindowsError: [Error 126] 

和

ctypes.windll.wow64_context()

相同的输出......

这条错误消息告诉我什么？