如何指定使用ctypes MessageBoxW单击“是/否”时实际发生的情况？

问题描述

def addnewunit(title, text, style):
    ctypes.windll.user32.MessageBoxW(0, text, title, style)

我见过很多人显示此代码，但是没有人指定如何实际执行是/否工作。它们是按钮，它们在那里，但是如何指定当您单击或时的实际情况？

Ive seen a lot of people show this code, however nobody has ever specified how to actually make the Yes/No work. Theyre buttons, and they are there, however how does one specify what actually happens when you click either or?

推荐答案

类似这样的东西使用正确的ctype包装：

Something like this with proper ctypes wrapping:

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import ctypes
from ctypes.wintypes import HWND, LPWSTR, UINT

_user32 = ctypes.WinDLL('user32', use_last_error=True)

_MessageBoxW = _user32.MessageBoxW
_MessageBoxW.restype = UINT  # default return type is c_int, this is not required
_MessageBoxW.argtypes = (HWND, LPWSTR, LPWSTR, UINT)

MB_OK = 0
MB_OKCANCEL = 1
MB_YESNOCANCEL = 3
MB_YESNO = 4

IDOK = 0
IDCANCEL = 2
IDABORT = 3
IDYES = 6
IDNO = 7


def MessageBoxW(hwnd, text, caption, utype):
    result = _MessageBoxW(hwnd, text, caption, utype)
    if not result:
        raise ctypes.WinError(ctypes.get_last_error())
    return result


def main():
    try:
        result = MessageBoxW(None, "text", "caption", MB_YESNOCANCEL)
        if result == IDYES:
            print("user pressed ok")
        elif result == IDNO:
            print("user pressed no")
        elif result == IDCANCEL:
            print("user pressed cancel")
        else:
            print("unknown return code")
    except WindowsError as win_err:
        print("An error occurred:\n{}".format(win_err))

if __name__ == "__main__":
    main()

请参见，以获取utype参数的各种值。

See the documentation for MessageBox for the various value of the utype argument.

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