如何指定使用 ctypes MessageBoxW 单击是/否时实际发生的情况？

Question

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

我已经看到很多人展示了这段代码，但是没有人指定如何实际使是/否工作。它们是按钮，它们就在那里，但是如何指定单击或单击时实际发生的情况？

Answer 1

像这样带有适当的 ctypes 包装：

#!/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 = 1
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()

有关utype 参数的各种值，请参阅MessageBox的文档。