多个WindowsBaloonTip / TrayTip通知？

Question

如果您使用下面的代码在通知区域中创建TrayTips（BaloonTips），您将注意到它仅允许一条消息，然后被卡住并出错。

# -- coding: utf-8 --

from win32api import *

from win32gui import *

import win32con

import sys, os

import struct

import time

class WindowsBalloonTip:

    def __init__(self, title, msg):

        message_map = {

                win32con.WM_DESTROY: self.OnDestroy,

        }

        # Register the Window class.

        wc = WNDCLASS()

        hinst = wc.hInstance = GetModuleHandle(None)

        wc.lpszClassName = "PythonTaskbar"

        wc.lpfnWndProc = message_map # could also specify a wndproc.

        classAtom = RegisterClass(wc)

        # Create the Window.

        style = win32con.WS_OVERLAPPED | win32con.WS_SYSMENU

        self.hwnd = CreateWindow( classAtom, "Taskbar", style, \

                0, 0, win32con.CW_USEDEFAULT, win32con.CW_USEDEFAULT, \

                0, 0, hinst, None)

        UpdateWindow(self.hwnd)

        iconPathName = os.path.abspath(os.path.join( sys.path[0], "balloontip.ico" ))

        icon_flags = win32con.LR_LOADFROMFILE | win32con.LR_DEFAULTSIZE

        try:

           hicon = LoadImage(hinst, iconPathName, \

                    win32con.IMAGE_ICON, 0, 0, icon_flags)

        except:

          hicon = LoadIcon(0, win32con.IDI_APPLICATION)

        flags = NIF_ICON | NIF_MESSAGE | NIF_TIP

        nid = (self.hwnd, 0, flags, win32con.WM_USER+20, hicon, "tooltip")

        Shell_NotifyIcon(NIM_ADD, nid)

        Shell_NotifyIcon(NIM_MODIFY, \

                         (self.hwnd, 0, NIF_INFO, win32con.WM_USER+20,\

                          hicon, "Balloon  tooltip",msg,200,title))

        # self.show_balloon(title, msg)

        time.sleep(10)

        DestroyWindow(self.hwnd)

    def OnDestroy(self, hwnd, msg, wparam, lparam):

        nid = (self.hwnd, 0)

        Shell_NotifyIcon(NIM_DELETE, nid)

        PostQuitMessage(0) # Terminate the app.

def balloon_tip(title, msg):

    w=WindowsBalloonTip(title, msg)