[IronPython] ctypes.py from FePy

Michael Foord fuzzyman at voidspace.org.uk
Mon Apr 7 18:54:56 CEST 2008

Hello all,

I've been trying to use ctypes.py from FePy for dynamic platform invoke. 
Unfortunately it doesn't appear to work...

I'm trying to follow the example at:


Unfortunately 'WDLL' doesn't exist in ctypes. If I replace it with 
'CDLL' it blows up with the following error:

 >>> usr = pinvoke.CDLL("user32.dll")
 >>> WM_KEYDOWN = 0x100
 >>> usr.PostMessage(HWND_BROADCAST, WM_KEYDOWN, ord('a'), 0)
Traceback (most recent call last):
  File , line 0, in <stdin>##88
  File pinvoke, line unknown, in __call__
  File e:\Dev\ironpython1\pinvoke.py, line 173, in __call__
SystemError: Object reference not set to an instance of an object.

Anyone got any ideas?

I'm using it with IronPython 1.1 as ctypes needs modifying slightly for 
IP 2.


Michael Foord

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