在 Python 2.x 時代貌似有支持 COM的。?http://svn.python.org/projects/ctypes/tags/release_0_6_2/ctypes/win32/com/__init__.py?這個 win32 的 COM 包到了 3.x 時代就不見了。從那里參考和借鑒了很多，也被誤導了很多，因為從

2.x 到 3.x 變化很大，而且那個包里面也有很多地方寫得不夠好。

閑話少說，直接貼代碼。沒加注釋，也省略一些復雜 Interface 的定義。

import atexit

import ctypes

import ctypes.wintypes

import traceback

import uuid

HRESULT= ctypes.wintypes.DWORD

LCID= ctypes.wintypes.DWORD

DISPID= ctypes.wintypes.INT

SCODE= ctypes.wintypes.DWORD

VARTYPE= ctypes.c_ushort

S_OK= 0

def __init__():

ctypes.oledll.ole32.CoInitialize(None)

atexit.register(ctypes.oledll.ole32.CoUninitialize)

__init__()

class GUID(ctypes.Structure):

_fields_ = [("Data1", ctypes.wintypes.DWORD),

("Data2", ctypes.wintypes.WORD),

("Data3", ctypes.wintypes.WORD),

("Data4", ctypes.wintypes.BYTE*8)]

def __init__(self, name=None):

iid = uuid.UUID(name)

self.Data1 = iid.time_low

self.Data2 = iid.time_mid

self.Data3 = iid.time_hi_version

data = iid.bytes

for i in range(8):

self.Data4[i] = ctypes.wintypes.BYTE(data[8+i])

def __str__(self):

s = (ctypes.c_wchar*39)()

ctypes.oledll.ole32.StringFromGUID2(ctypes.byref(self), s, 39)

return s.value

REFGUID = REFIID = RIID = ctypes.POINTER(GUID)

class _InterfaceMetaclass(type(ctypes.Structure)):

def __new__(cls, name, bases, kwds):

if "_methods_" in kwds and "_methods_" in bases[0].__dict__:

kwds["_methods_"] = bases[0]._methods_+kwds["_methods_"]

lpVTable = ctypes.POINTER(name+"_VTable")

kwds["_fields_"] = [("lpVtbl", lpVTable)]

newcls = super().__new__(cls, name, bases, kwds)

newcls.lpVTable = lpVTable

if "_methods_" in kwds:

"""make methods"""

newcls._com_methods_ = {}

i = 0

for func, proto in kwds["_methods_"]:

newcls._com_methods_[func] = proto(i, func)

setattr(newcls, func, newcls._InvokeComMethod)

i += 1

return newcls

class IUnknown(ctypes.Structure, metaclass = _InterfaceMetaclass):

def _InvokeComMethod(self, *args):

func = traceback.extract_stack()[-2][-1].split('.')[1].split('(')[0]

return self._com_methods_[func](ctypes.c_void_p(ctypes.addressof(self)), *args)

_iid_ = GUID("{618736E0-3C3D-11CF-810C-00AA00389B71}")

PIUnknown = ctypes.POINTER(IUnknown)

def from_param(self, obj):

if (type(obj) == type(ctypes.byref(ctypes.c_int())) and issubclass(obj._obj._type_, IUnknown)) \

or (isinstance(obj, ctypes._Pointer) and issubclass(obj._type_._type, IUnknown)):

return obj

raise TypeError("expected a reference to IUnknown instead of "+str(type(obj)))

ctypes.POINTER(PIUnknown).from_param = classmethod(from_param)

def STDMETHOD(restype, name, *argtypes, **kw):

return name, ctypes.WINFUNCTYPE(restype, *argtypes)

IUnknown._methods_ = [STDMETHOD(HRESULT, "QueryInterface", REFIID, ctypes.POINTER(PIUnknown)),

STDMETHOD(ctypes.wintypes.ULONG, "AddRef"),

STDMETHOD(ctypes.wintypes.ULONG, "Release")]

IUnknown = _InterfaceMetaclass("IUnknown", (ctypes.Structure,), {"_methods_": IUnknown._methods_, "_iid_": IUnknown._iid_, "_InvokeComMethod": IUnknown._InvokeComMethod})

PIUnknown = ctypes.POINTER(IUnknown)

class ITypeInfo(IUnknown, metaclass = _InterfaceMetaclass):

_iid_ = GUID("{00020401-0000-0000-C000-000000000046}")

class IDispatch(IUnknown, metaclass = _InterfaceMetaclass):

_iid_ = GUID("{00020400-0000-0000-C000-000000000046}")

class BSTR(ctypes.c_wchar_p):

def __del__(self):

ctypes.oledll.oleaut32.SysFreeString(self)

def __repr__(self):

return self.value

"""http://msdn.microsoft.com/en-us/library/windows/desktop/dd373687(v=vs.85).aspx"""

class VARIANT(ctypes.Structure):

class _U(ctypes.Union):

_fields_ = [("lVal", ctypes.wintypes.LONG),# VT_I4

("pdispVal", ctypes.POINTER(IDispatch)),# VT_IDISPATCH

("bstrVal", BSTR)]# VT_BSTR

_anonymous_ = ("_u",)

_fields_ = [("vt", VARTYPE),

("wReserved1", ctypes.wintypes.WORD),

("wReserved2", ctypes.wintypes.WORD),

("wReserved3", ctypes.wintypes.WORD),

("_u", _U)]

class DISPPARAMS(ctypes.Structure):

_fields_ = [("rgvarg", ctypes.POINTER(VARIANT)),

("rgdispidNamedArgs", ctypes.POINTER(DISPID)),

("cArgs", ctypes.wintypes.UINT),

("cNamedArgs", ctypes.wintypes.UINT)]

class EXCEPINFO(ctypes.Structure):

_fields_ = [("wCode", ctypes.wintypes.WORD),

("wReserved", ctypes.wintypes.WORD),

("bstrSource", BSTR),

("bstrDescription", BSTR),

("bstrHelpFile", BSTR),

("dwHelpContext", ctypes.wintypes.DWORD),

("pvReserved", ctypes.c_void_p),

("pfnDeferredFillIn", ctypes.c_void_p), # XXX

("scode", SCODE)]

IDispatch._methods_ = [STDMETHOD(HRESULT, "GetTypeInfoCount", ctypes.wintypes.UINT),

STDMETHOD(HRESULT, "GetTypeInfo", ctypes.wintypes.UINT, LCID, ctypes.POINTER(ctypes.POINTER(ITypeInfo))),

STDMETHOD(HRESULT, "GetIDsOfNames", REFIID, ctypes.wintypes.LPOLESTR, ctypes.wintypes.ULONG, LCID, ctypes.POINTER(DISPID)),

STDMETHOD(HRESULT, "Invoke", DISPID, REFIID, LCID, ctypes.wintypes.WORD, ctypes.POINTER(DISPPARAMS), ctypes.POINTER(VARIANT), ctypes.POINTER(EXCEPINFO), ctypes.wintypes.UINT)]

IDispatch = _InterfaceMetaclass("IDispatch", (IUnknown,), {"_methods_": IDispatch._methods_})

PIDispatch = ctypes.POINTER(IDispatch)

class IAccessible(IDispatch, metaclass = _InterfaceMetaclass):

_iid_ = GUID("{618736E0-3C3D-11CF-810C-00AA00389B71}")

_methods_ = [STDMETHOD(HRESULT, "get_accParent", ctypes.POINTER(PIDispatch)),

STDMETHOD(HRESULT, "get_accChildCount", ctypes.POINTER(ctypes.c_long)),

STDMETHOD(HRESULT, "get_accChild", VARIANT, ctypes.POINTER(PIDispatch)),

STDMETHOD(HRESULT, "get_accName", VARIANT, ctypes.POINTER(BSTR)),

STDMETHOD(HRESULT, "get_accValue", VARIANT, ctypes.POINTER(BSTR)),

STDMETHOD(HRESULT, "get_accDescription", VARIANT, ctypes.POINTER(BSTR)),

STDMETHOD(HRESULT, "get_accRole", VARIANT, ctypes.POINTER(VARIANT)),

STDMETHOD(HRESULT, "get_accState", VARIANT, ctypes.POINTER(VARIANT)),

STDMETHOD(HRESULT, "get_accHelp", VARIANT, ctypes.POINTER(BSTR)),

STDMETHOD(HRESULT, "get_accHelpTopic", ctypes.POINTER(BSTR), VARIANT, ctypes.POINTER(ctypes.c_long)),

STDMETHOD(HRESULT, "get_accKeyboardShortcut", VARIANT, ctypes.POINTER(BSTR)),

STDMETHOD(HRESULT, "get_accFocus", ctypes.POINTER(VARIANT)),

STDMETHOD(HRESULT, "get_accSelection", ctypes.POINTER(VARIANT)),

STDMETHOD(HRESULT, "get_accDefaultAction", VARIANT, ctypes.POINTER(BSTR)),

STDMETHOD(HRESULT, "accSelect", ctypes.c_long, VARIANT),

STDMETHOD(HRESULT, "accLocation", ctypes.POINTER(ctypes.c_long), ctypes.POINTER(ctypes.c_long), ctypes.POINTER(ctypes.c_long), ctypes.POINTER(ctypes.c_long), VARIANT),

STDMETHOD(HRESULT, "accNavigate", ctypes.c_long, VARIANT, ctypes.POINTER(VARIANT)),

STDMETHOD(HRESULT, "accHitTest", ctypes.c_long, ctypes.c_long, ctypes.POINTER(VARIANT)),

STDMETHOD(HRESULT, "accDoDefaultAction", VARIANT),

STDMETHOD(HRESULT, "put_accName", VARIANT, BSTR),# not supported

STDMETHOD(HRESULT, "put_accValue", VARIANT, BSTR)]

PIAccessible = ctypes.POINTER(IAccessible)

class IServiceProvider(IUnknown, metaclass = _InterfaceMetaclass):

_iid_ = GUID("{6D5140C1-7436-11CE-8034-00AA006009FA}")

_methods_ = [STDMETHOD(HRESULT, "QueryService", REFGUID, REFIID, ctypes.POINTER(PIUnknown))]

PIServiceProvider = ctypes.POINTER(IServiceProvider)

總結

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