How can I debug SendKeysCtypes on (win7 64bit, py2.7) further?

Question

I am trying to get SendKeysCtypes while working on py2.7 and win7 64bit . Here is src

Problem:

Run SendKeysCtypes.py and nothing happens. Tests should open a notebook and write text.

Problem Code:

def GetInput(self):
    "Build the INPUT structure for the action"
    actions = 1
    # if both up and down
    if self.up and self.down:
        actions = 2

    inputs = (INPUT * actions)()

    vk, scan, flags = self._get_key_info()

    for inp in inputs:
        inp.type = INPUT_KEYBOARD

        inp._.ki.wVk = vk
        inp._.ki.wScan = scan
        inp._.ki.dwFlags |= flags

    # if we are releasing - then let it up
    if self.up:
        inputs[-1]._.ki.dwFlags |= KEYEVENTF_KEYUP

    return inputs

def Run(self):
    "Execute the action"
    inputs = self.GetInput()
    return SendInput(
        len(inputs),
        ctypes.byref(inputs),
        ctypes.sizeof(INPUT))

SendInput () in the above code does nothing.

Other tests

• I tried the code in this answer and it worked fine. But this code had some other problems.

• According to the author, it should work with py3.1

• SendInput () returns '0' , which means "locked by another thread"

• ctypes.GetLastError() 87, "ERROR_INVALID_PARAMETER"

, , - ?

1:

• "64bit is problem", SO, , .

Answer 1

Structure Union, . , , :

class KEYBDINPUT(ctypes.Structure):
    "A particular keyboard event"
    _pack_ = 2  # FIXME: don't do this
    _fields_ = [
        # C:/PROGRA~1/MICROS~4/VC98/Include/winuser.h 4292
        ('wVk', WORD),
        ('wScan', WORD),
        ('dwFlags', DWORD),
        ('time', DWORD),
        ('dwExtraInfo', DWORD),  # FIXME: use correct data type
    ]

( FIXME , .)

-, _pack_ = 2, . - _pack_. 32-, 64- Windows.

, _pack_ = 2 32- Windows: 2 , , , , , 4- .

64- Windows 8 , , _pack_ = 2 _pack_ = 4 .

, ULONG_PTR ctypes.wintypes, dwExtraInfo. 32- Windows ULONG_PTR 32- , 64- Windows 64- .

MSDN Windows , :

#if defined(_WIN64)
 typedef unsigned __int64 ULONG_PTR;
#else
 typedef unsigned long ULONG_PTR;
#endif

DWORD ULONG dwExtraInfo, 32- Windows .

POINTER , , , ULONG_PTR - " , () ", .

wintypes, , WPARAM , ULONG_PTR. , ( ) ULONG_PTR :

from ctypes.wintypes import WPARAM as ULONG_PTR

, :

import ctypes

for ULONG_PTR in [ctypes.c_ulong, ctypes.c_ulonglong]:
    if ctypes.sizeof(ULONG_PTR) == ctypes.sizeof(ctypes.c_void_p):
        break
else:
    raise TypeError("cannot find a suitable type for ULONG_PTR")

, :

class MOUSEINPUT(ctypes.Structure):
    _fields_ = [
        ('dw',          LONG),
        ('dy',          LONG),
        ('mouseData',   DWORD),
        ('dwFlags',     DWORD),
        ('time',        DWORD),
        ('dwExtraInfo', ULONG_PTR),
    ]


class KEYBDINPUT(ctypes.Structure):
    _fields_ = [
        ('wVk',         WORD),
        ('wScan',       WORD),
        ('dwFlags',     DWORD),
        ('time',        DWORD),
        ('dwExtraInfo', ULONG_PTR),
    ]


class HARDWAREINPUT(ctypes.Structure):
    _fields_ = [
        ('uMsg',    DWORD),
        ('wParamL', WORD),
        ('wParamH', WORD),
    ]


class _INPUT(ctypes.Union):
    _fields_ = [
        ('mi', MOUSEINPUT),
        ('ki', KEYBDINPUT),
        ('hi', HARDWAREINPUT),
    ]


class INPUT(ctypes.Structure):
    _anonymous_ = ['']
    _fields_ = [
        ('type', DWORD),
        ('', _INPUT),
    ]