CODEWITHSUNDEEP
pythonwinapieventsscrollmouse
Sch
Sch

Reputation: 3

How to get global scroll events on python win32api

How can I get global scroll events with win32api on Python? I searched how can I do that and found answer: https://stackoverflow.com/a/65101276/8705882, and it is not working due to an error.

Traceback (most recent call last):
  File "H:/programing/p_python/woweyscroll/study1.py", line 21, in <module>
    hook_id = user32.SetWindowsHookExW(
ctypes.ArgumentError: argument 3: <class 'OverflowError'>: int too long to convert

If there is how to solve this error or another method of getting global mouse scroll event, please let me know!

Upvotes: 0

Views: 343

Answers (1)

Zeus
Zeus

Reputation: 3890

If you are running on a 64-bit system, using the win32api.GetModuleHandle(None) parameter will cause this error.

The reason is that the function recognizes the parameter as C int, you can modify it to c_void_p(win32api.GetModuleHandle(None) to solve this problem.

hook_id = user32.SetWindowsHookExW(win32con.WH_MOUSE_LL,pointer,c_void_p(win32api.GetModuleHandle(None)), 0)

This can work normally under both 32-bit and 64-bit systems.

Edit

import win32api 
import win32con
import ctypes
from ctypes import windll, CFUNCTYPE, c_int, c_void_p

 

user32 = ctypes.windll.user32
kernel32 = ctypes.windll.kernel32
user32.CallNextHookEx.argtypes = [ctypes.wintypes.HHOOK,c_int, ctypes.wintypes.WPARAM, ctypes.wintypes.LPARAM]

 

def LowLevelMouseProc(nCode, wParam, lParam):
    if wParam == win32con.WM_MOUSEWHEEL:
        print("mousewheel triggerd!")
    return user32.CallNextHookEx(hook_id, nCode, wParam, lParam)

 

if __name__ == '__main__':
    CMPFUNC = CFUNCTYPE(c_void_p, c_int, ctypes.wintypes.WPARAM, ctypes.wintypes.LPARAM)
    user32.SetWindowsHookExW.argtypes = [c_int,CMPFUNC,ctypes.wintypes.HINSTANCE,ctypes.wintypes.DWORD]
    pointer = CMPFUNC(LowLevelMouseProc)
    hook_id = user32.SetWindowsHookExW(win32con.WH_MOUSE_LL,pointer,win32api.GetModuleHandle(None), 0)
    msg = ctypes.wintypes.MSG()
    while user32.GetMessageW(ctypes.byref(msg), 0, 0, 0) != 0:
        user32.TranslateMessage(msg)
        user32.DispatchMessageW(msg)

Upvotes: 1

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