Hello Eryk,
thank you for your interest in my problem and you've nailed it, the problem
was solved by putting all Windows API definitions in a separate module and
making sure that I only use WinDLL.
I would never have thought of that, because I only used WinDLL in this
module.
But a PostMessage in another module, which I created with windll, seems to
have confused things a bit and now that I have merged this and other
modules into one, I don't see the problem anymore.
Here is the desired excerpt. (user32 is now import from win32api, where all
other definitions are now also)
def new_scintilla2_proc(self, hWnd, msg, wParam, lParam):
if self.__WndProc(hWnd, msg, wParam, lParam):
return 0
print(f'{hWnd=}, {msg=}, {wParam=}, {lParam=}')
return user32.CallWindowProcW(self.prev_scintilla2_wnd_proc, hWnd,
msg, wParam, lParam)
def __WndProc(self, hWnd, msg, wParam, lParam):
event_handler = self._event_handler.get(msg, None)
if event_handler:
return event_handler(msg, wParam, lParam)
return False
Once again, thank you
Eren
Am Mi., 29. Juli 2020 um 16:26 Uhr schrieb Eryk Sun <eryk...@gmail.com>:
> On 7/28/20, Eko palypse <ekopaly...@gmail.com> wrote:
> >
> > Now when I get this error the message I receive in this situation is
> always
> > like this.
> >
> > hWnd=197364, msg=20, wParam=*18446744072652653190*, lParam=0
> >
> > Traceback (most recent call last):
> > File "_ctypes/callbacks.c", line 237, in 'calling callback function'
> > File "<string>", line 121, in new_scintilla2_proc
> > ctypes.ArgumentError: argument 4: <class 'OverflowError'>: int too long
> to
> > convert
>
> Can you provide a more complete example of how you're calling
> CallWindowProcW in new_scintilla2_proc? It seems like a function
> pointer is being called that doesn't have argtypes defined. For
> example:
>
> >>> user32 = ctypes.WinDLL('user32', use_last_error=True)
> >>> user32.CallWindowProcW(None, None, 0x14, 18446744072652653190, 0)
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> ctypes.ArgumentError: argument 4: <class 'OverflowError'>: int too
> long to convert
>
> Perhaps in new_scintilla2_proc you're using a different instance of
> ctypes.WinDLL, or you switched to using ctypes.windll.user32. I
> recommend avoiding the global ctypes.LibraryLoader instances --
> ctypes.cdll, ctypes.windll, and ctypes.oledll -- because using them
> leads to conflicts with other libraries, but you do need to use a
> single instance of ctypes.WinDLL for your user32 function prototypes,
> imported from a common module.
>
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