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Script to emulate key-presses on Windows via Python.
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# directkeys.py | |
# http://stackoverflow.com/questions/13564851/generate-keyboard-events | |
# msdn.microsoft.com/en-us/library/dd375731 | |
import ctypes | |
from ctypes import wintypes | |
import time | |
user32 = ctypes.WinDLL('user32', use_last_error=True) | |
INPUT_MOUSE = 0 | |
INPUT_KEYBOARD = 1 | |
INPUT_HARDWARE = 2 | |
KEYEVENTF_EXTENDEDKEY = 0x0001 | |
KEYEVENTF_KEYUP = 0x0002 | |
KEYEVENTF_UNICODE = 0x0004 | |
KEYEVENTF_SCANCODE = 0x0008 | |
MAPVK_VK_TO_VSC = 0 | |
# List of all codes for keys: | |
# # msdn.microsoft.com/en-us/library/dd375731 | |
UP = 0x26 | |
DOWN = 0x28 | |
A = 0x41 | |
# C struct definitions | |
wintypes.ULONG_PTR = wintypes.WPARAM | |
class MOUSEINPUT(ctypes.Structure): | |
_fields_ = (("dx", wintypes.LONG), | |
("dy", wintypes.LONG), | |
("mouseData", wintypes.DWORD), | |
("dwFlags", wintypes.DWORD), | |
("time", wintypes.DWORD), | |
("dwExtraInfo", wintypes.ULONG_PTR)) | |
class KEYBDINPUT(ctypes.Structure): | |
_fields_ = (("wVk", wintypes.WORD), | |
("wScan", wintypes.WORD), | |
("dwFlags", wintypes.DWORD), | |
("time", wintypes.DWORD), | |
("dwExtraInfo", wintypes.ULONG_PTR)) | |
def __init__(self, *args, **kwds): | |
super(KEYBDINPUT, self).__init__(*args, **kwds) | |
# some programs use the scan code even if KEYEVENTF_SCANCODE | |
# isn't set in dwFflags, so attempt to map the correct code. | |
if not self.dwFlags & KEYEVENTF_UNICODE: | |
self.wScan = user32.MapVirtualKeyExW(self.wVk, | |
MAPVK_VK_TO_VSC, 0) | |
class HARDWAREINPUT(ctypes.Structure): | |
_fields_ = (("uMsg", wintypes.DWORD), | |
("wParamL", wintypes.WORD), | |
("wParamH", wintypes.WORD)) | |
class INPUT(ctypes.Structure): | |
class _INPUT(ctypes.Union): | |
_fields_ = (("ki", KEYBDINPUT), | |
("mi", MOUSEINPUT), | |
("hi", HARDWAREINPUT)) | |
_anonymous_ = ("_input",) | |
_fields_ = (("type", wintypes.DWORD), | |
("_input", _INPUT)) | |
LPINPUT = ctypes.POINTER(INPUT) | |
def _check_count(result, func, args): | |
if result == 0: | |
raise ctypes.WinError(ctypes.get_last_error()) | |
return args | |
user32.SendInput.errcheck = _check_count | |
user32.SendInput.argtypes = (wintypes.UINT, # nInputs | |
LPINPUT, # pInputs | |
ctypes.c_int) # cbSize | |
# Functions | |
def PressKey(hexKeyCode): | |
x = INPUT(type=INPUT_KEYBOARD, | |
ki=KEYBDINPUT(wVk=hexKeyCode)) | |
user32.SendInput(1, ctypes.byref(x), ctypes.sizeof(x)) | |
def ReleaseKey(hexKeyCode): | |
x = INPUT(type=INPUT_KEYBOARD, | |
ki=KEYBDINPUT(wVk=hexKeyCode, | |
dwFlags=KEYEVENTF_KEYUP)) | |
user32.SendInput(1, ctypes.byref(x), ctypes.sizeof(x)) | |
if __name__ == "__main__": | |
PressKey(A) | |
time.sleep(0.5) | |
ReleaseKey(A) | |
print("Pressed") |
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