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May 31, 2020 07:51
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Send Windows keyboard events from Python script
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| import ctypes | |
| from ctypes import wintypes | |
| import time | |
| import msvcrt | |
| 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 | |
| # msdn.microsoft.com/en-us/library/add375731 | |
| VK_TAB = 0x09 | |
| VK_MENU = 0x12 | |
| # 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)) | |
| def AltTab(): | |
| """Press Alt+Tab and hold Alt key for 2 seconds | |
| in order to see the overlay.a | |
| """ | |
| PressKey(VK_MENU) # Alt | |
| PressKey(VK_TAB) # Tab | |
| ReleaseKey(VK_TAB) # Tab~ | |
| time.sleep(2) | |
| ReleaseKey(VK_MENU) # Alt~ | |
| if __name__ == "__main__": | |
| print("Hello") | |
| # AltTab() | |
| for _ in range(1000000): | |
| for _ in range(1000000): | |
| PressKey(0x41) | |
| inp = msvcrt.getch() | |
| time.sleep(3) | |
| if msvcrt.kbhit(): | |
| print("Finished") | |
| exit() |
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