I am making an message box in python 2.7 on windows 7 64 bit machine. It will rise to show error message to user in message box.

我在Windows7 64位机器上用python2.7制作了一个消息框。则会在消息框中向用户显示错误消息。

import ctypes

msgbox = ctypes.windll.user32.MessageBoxA
ret = msgbox(None, 'message', 'title', 0)
print ret

This shows the required message box. But in taskbar the default image of python appears which is annoying. So, how to include image in taskbar. Or just not to show default image of python in taskbar.

这将显示所需的消息框。但在任务栏中显示的是默认的python图像，这很烦人。那么，如何在任务栏中包含图片呢？或者只是不在任务栏中显示默认的PYTHON图像。

This is because you don't have a window, None, and then the system will assign a default icon.

这是因为你没有一个窗口，没有，然后系统会分配一个默认图标。

You can install a hook using SetWindowsHookEx and then alter MessageBox icon. For example let's use StackOverflow icon.

您可以使用SetWindowsHookEx安装钩子，然后更改MessageBox图标。例如，让我们使用StackOverflow图标。

#-*- coding: utf-8 -*-
#!python


from ctypes import *
from ctypes.wintypes import *
#recommended
#from ctypes import windll, c_int, c_int64, c_long, WINFUNCTYPE, POINTER, cast, c_wchar, byref
#from ctypes.wintypes import HMODULE, LPCWSTR, HANDLE, HINSTANCE, UINT, HWND, WPARAM, LPARAM, HHOOK, DWORD, BOOL, RECT, POINT
from os import path
import platform

#################################################################

RelPath = lambda file : path.join(path.dirname(path.abspath(__file__)), file)

#################################################################

GetModuleHandle = windll.kernel32.GetModuleHandleW
GetModuleHandle.restype = HMODULE
GetModuleHandle.argtypes = [LPCWSTR]

#################################################################

IMAGE_ICON = 1
LR_LOADFROMFILE = 0x00000010
LR_CREATEDIBSECTION = 0x00002000

LoadImage = windll.user32.LoadImageW
LoadImage.restype = HANDLE
LoadImage.argtypes = [HINSTANCE, LPCWSTR, UINT, c_int, c_int, UINT]

#################################################################

LRESULT = c_int64 if platform.architecture()[0] == "64bit" else c_long

SendMessage = windll.user32.SendMessageW
SendMessage.restype = LRESULT
SendMessage.argtypes = [HWND, UINT, WPARAM, LPARAM]

#################################################################

MB_OK = 0x00000000L 

MessageBox = windll.user32.MessageBoxW
MessageBox.restype  = c_int
MessageBox.argtypes = [HWND, LPCWSTR, LPCWSTR, UINT]

#################################################################

WH_CBT = 5
HCBT_ACTIVATE = 5
HOOKPROC = WINFUNCTYPE(LRESULT, c_int, WPARAM, LPARAM)

SetWindowsHookEx = windll.user32.SetWindowsHookExW
SetWindowsHookEx.restype = HHOOK
SetWindowsHookEx.argtypes = [c_int, HOOKPROC, HINSTANCE, DWORD]

#################################################################

CallNextHookEx = windll.user32.CallNextHookEx
CallNextHookEx.restype = LRESULT
CallNextHookEx.argtypes = [HHOOK, c_int, WPARAM, LPARAM]

#################################################################

GetCurrentThreadId = windll.kernel32.GetCurrentThreadId
GetCurrentThreadId.restype = DWORD
GetCurrentThreadId.argtypes = None

#################################################################

UnhookWindowsHookEx = windll.user32.UnhookWindowsHookEx
UnhookWindowsHookEx.restype = BOOL
UnhookWindowsHookEx.argtypes = [HHOOK]

#################################################################
# code starts here

def MyMessageBox(hWnd, lpText, lpCaption, uType, lpIcon):
  hHook = HHOOK(None)

  #**********************************************************#
    # center button code
  def EnumChildProc(hwnd, lParam):
    ClassName = (c_wchar * 7)()
    if GetClassName(hwnd, ClassName, 7) > 0:
      if ClassName.value.lower() == "button":
        wrect = RECT()
        GetClientRect(lParam, byref(wrect))
        brect = RECT()
        GetClientRect(hwnd, byref(brect))
        bpoint = RECT()
        MapWindowPoints(hwnd, lParam, cast(byref(bpoint), POINTER(POINT)), 2)
        MoveWindow(hwnd,
                  ((wrect.right - wrect.left) - (brect.right - brect.left)) // 2,
                  bpoint.top,
                  brect.right - brect.left,
                  brect.bottom - brect.top,
                  True)
        return False
    return True
    
  WNDENUMPROC = WINFUNCTYPE(BOOL, HWND, LPARAM)

  EnumChildWindows = windll.user32.EnumChildWindows
  EnumChildWindows.restype = BOOL
  EnumChildWindows.argtypes = [HWND, WNDENUMPROC, LPARAM]

  GetClassName = windll.user32.GetClassNameW
  GetClassName.restype = HWND
  GetClassName.argtypes = [HWND, LPCWSTR, c_int]

  GetClientRect = windll.user32.GetClientRect 
  GetClientRect.restype = BOOL
  GetClientRect.argtypes = [HWND, POINTER(RECT)]
  
  MoveWindow = windll.user32.MoveWindow
  MoveWindow.restype = BOOL
  MoveWindow.argtypes = [HWND, c_int, c_int, c_int, c_int, BOOL]
  
  MapWindowPoints = windll.user32.MapWindowPoints
  MapWindowPoints.restype = c_int
  MapWindowPoints.argtypes = [HWND, HWND, POINTER(POINT), UINT]
    
  #**********************************************************#

  def AlterIcon(_hWnd, lpszIcon):

    WM_SETICON = 0x0080
    ICON_BIG = 1

    hModel = GetModuleHandle(None)
    hIcon = LoadImage(hModel,
                      RelPath(lpszIcon),
                      IMAGE_ICON,
                      0, 0,
                      LR_LOADFROMFILE | LR_CREATEDIBSECTION)


    SendMessage(_hWnd, WM_SETICON, ICON_BIG, hIcon)

  def CBTProc(nCode, wParam, lParam):
    if nCode == HCBT_ACTIVATE:
      _hWnd = cast(wParam, HWND)
      AlterIcon(_hWnd, lpIcon)
      #**********************************************************#
      pEnumChildProc = WNDENUMPROC(EnumChildProc)
      EnumChildWindows(_hWnd, pEnumChildProc, _hWnd.value)
      #**********************************************************#

    CallNextHookEx(hHook, nCode, wParam, lParam)
    return 0

  # WARNING: don't pass HOOKPROC(CBTProc) directly to SetWindowsHookEx
  pCBTProc = HOOKPROC(CBTProc)

  hHook = SetWindowsHookEx(WH_CBT, pCBTProc, None, GetCurrentThreadId())

  MessageBox(hWnd, lpText, lpCaption, uType)

  UnhookWindowsHookEx(hHook)

# example of usage
MyMessageBox(None, "Hello world!", "Title", MB_OK, "favicon.ico")

Most the code is just functions prototype. Now you can call MyMessageBox as:

大部分代码只是函数的原型。现在您可以这样调用MyMessageBox：

MyMessageBox(None, "Hello world!", "Title", MB_OK, "favicon.ico")

result:

结果：

UPDATE: it will center the button now by enumerating through the message box window's chillers and looking for a button, then center it. I haven't test it much but it looks OK so far.

更新：它现在将通过枚举消息框窗口的冷却器并查找按钮来居中按钮，然后将其居中。我没怎么试过，但到目前为止它看起来还可以。