我们可以利用windows提供的api函数来实现对系统键盘事件和鼠标事件的监听，主要利用的是SetWindowsHookEx函数，这个函数可以允许调用者传入一个钩子函数也叫回调函数，当指定的事件发生时，你
传入的函数就会被触发，有些事件是进程级的，有些事件是系统级的，这里我们用WH_KEYBOARD_LL来监听系统键盘事件，用WH_MOUSE_LL来监听鼠标事件，注意不是WH_KEYBOARD，使用WH_KEYBOARD是无法监听到外部
程序的事件的，这个可以在windows官方文档里面看到说明，要用WH_KEYBOARD来监听系统键盘必须写dll去实现。
因为用到了一些宏定义在win32con里面已经有了，所以需要安装一下pypiwin32，当然如果你将这些宏定义写在自己的文件中，那么就不用安装pypiwin32了。
安装pypiwin32
pip install pypiwin32
# coding=utf-8
from ctypes import *
from ctypes import wintypes
import win32con
SetWindowsHookEx=windll.user32.SetWindowsHookExA
UnhookWindowsHookEx=windll.user32.UnhookWindowsHookEx
CallNextHookEx=windll.user32.CallNextHookEx
GetMessage=windll.user32.GetMessageA
GetModuleHandle=windll.kernel32.GetModuleHandleW
#保存键盘钩子函数句柄
keyboard_hd = None
#保存鼠标钩子函数句柄
mouse_hd = None
class KBDLLHOOKSTRUCT(Structure):
_fields_ = [
('vkCode',c_int),
('scanCode', c_int),
('flags', c_int),
('time', c_int),
('dwExtraInfo', c_uint),
('',c_void_p)
]
class POINT(Structure):
_fields_ = [
('x',c_long),
('y',c_long)
]
class MSLLHOOKSTRUCT(Structure):
_fields_ = [
('pt',POINT),
('hwnd',c_int),
('wHitTestCode',c_uint),
('dwExtraInfo',c_uint),
]
def wait_for_msg():
msg = wintypes.MSG()
GetMessage(msg, 0, 0, 0)
def keyboard_pro(nCode, wParam, lParam):
"""
函数功能：键盘钩子函数，当有按键按下时此函数被回调
"""
if nCode == win32con.HC_ACTION:
KBDLLHOOKSTRUCT_p = POINTER(KBDLLHOOKSTRUCT)
param=cast(lParam,KBDLLHOOKSTRUCT_p)
print(param.contents.vkCode)
return CallNextHookEx(keyboard_hd, nCode, wParam, lParam)
def start_keyboard_hook():
"""
函数功能：启动键盘监听
"""
HOOKPROTYPE = CFUNCTYPE(c_int, c_int, c_int, POINTER(c_void_p))
pointer = HOOKPROTYPE(keyboard_pro)
keyboard_hd = SetWindowsHookEx(
win32con.WH_KEYBOARD_LL,
pointer,
GetModuleHandle(None),
0)
wait_for_msg()
def stop_keyboard_hook():
"""
函数功能：停止键盘监听
"""
UnhookWindowsHookEx(keyboard_hd)
def mouse_pro(nCode, wParam, lParam):
"""
函数功能：鼠标钩子函数，当有鼠标事件，此函数被回调
"""
if nCode == win32con.HC_ACTION:
MSLLHOOKSTRUCT_p = POINTER(MSLLHOOKSTRUCT)
param=cast(lParam,MSLLHOOKSTRUCT_p)
#鼠标左键点击
if wParam == win32con.WM_LBUTTONDOWN:
print("左键点击，坐标：x:%d,y:%d" % (param.contents.pt.x,param.contents.pt.y))
elif wParam == win32con.WM_LBUTTONUP:
print("左键抬起，坐标：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
elif wParam == win32con.WM_MOUSEMOVE:
print("鼠标移动，坐标：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
elif wParam == win32con.WM_RBUTTONDOWN:
print("右键点击，坐标：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
elif wParam == win32con.WM_RBUTTONUP:
print("右键抬起，坐标：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
return CallNextHookEx(mouse_hd, nCode, wParam, lParam)
def start_mouse_hook():
"""
函数功能：启动鼠标监听
"""
HOOKPROTYPE = CFUNCTYPE(c_int, c_int, c_int, POINTER(c_void_p))
pointer = HOOKPROTYPE(mouse_pro)
mouse_hd = SetWindowsHookEx(
win32con.WH_MOUSE_LL,
pointer,
GetModuleHandle(None),
0)
wait_for_msg()
def stop_mouse_hook():
"""
函数功能：停止鼠标监听
"""
UnhookWindowsHookEx(mouse_hd)
测试代码：
import HookApi if __name__== '__main__': HookApi.start_keyboard_hook()
运行效果
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