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。
输入：pip install pypiwin32 安装pypiwin32。
# coding=utf-8from ctypes import *from ctypes import wintypesimport win32conSetWindowsHookEx=windll.user32.SetWindowsHookExAUnhookWindowsHookEx=windll.user32.UnhookWindowsHookExCallNextHookEx=windll.user32.CallNextHookExGetMessage=windll.user32.GetMessageAGetModuleHandle=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 = Noneclass 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 HookApiif __name__== '__main__': HookApi.start_keyboard_hook()
打开一个txt文件，在里面输入文字，
