Here is a patch for comtypes that will pass byref(...) or pointer(...)
arguments as VT_BYREF variants. It should workfor Pablos and Michaels
use cases - also it demonstrates how to access the original object
of a byref(..) call:
Index: comtypes/automation.py
===================================================================
--- comtypes/automation.py (revision 564)
+++ comtypes/automation.py (working copy)
@@ -1,5 +1,6 @@
# comtypes.automation module
from ctypes import *
+from ctypes import _Pointer
from _ctypes import CopyComPointer
from comtypes import IUnknown, GUID, IID, STDMETHOD, BSTR, COMMETHOD, COMError
from comtypes.hresult import *
@@ -48,6 +49,7 @@
# helpers
IID_NULL = GUID()
riid_null = byref(IID_NULL)
+_byref_type = type(byref(c_int()))
# 30. December 1899, midnight. For VT_DATE.
_com_null_date = datetime.datetime(1899, 12, 30, 0, 0, 0)
@@ -296,6 +298,16 @@
elif isinstance(value, c_float):
self.vt = VT_R4
self._.VT_R4 = value
+ elif isinstance(value, _byref_type):
+ ref = value._obj
+ self._.c_void_p = addressof(ref)
+ self.__keepref = value
+ self.vt = _ctype_to_vartype[type(ref)] | VT_BYREF
+ elif isinstance(value, _Pointer):
+ ref = value.contents
+ self._.c_void_p = addressof(ref)
+ self.__keepref = value
+ self.vt = _ctype_to_vartype[type(ref)] | VT_BYREF
else:
raise TypeError("Cannot put %r in VARIANT" % value)
# buffer -> SAFEARRAY of VT_UI1 ?
--
Thanks,
Thomas
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