防止从python关闭窗口

Question

我想阻止Windows（xp和7）关闭。 为此，我似乎必须拦截WM_QUERYENDSESSION消息并返回False。

好的我必须更正我的陈述，此程序在Windows 7下工作正常，但在Windows 7嵌入式标准Service Pack 1上它不会阻止关机！

import ctypes
from ctypes import c_long, c_int, c_wchar_p
import time
import win32api
import win32con
import win32gui
import win32process

oldWndProc = None

def wndproc(hWnd, msg, wParam, lParam):
    print("wndproc received message: %s" % msg)
    if (msg == win32con.WM_QUERYENDSESSION):
        print("wndproc received WM_QUERYENDSESSION")
        return 0
    # Pass all messages to the original WndProc
    return win32gui.CallWindowProc(oldWndProc, hWnd, msg, wParam, lParam)


if __name__ == "__main__":

    try:
        # Create a window just to be able to receive WM_QUERYENDSESSION messages
        win32api.SetLastError(0)
        hinst = win32api.GetModuleHandle(None)
        messageMap = {}
        wndclass = win32gui.WNDCLASS()
        wndclass.hInstance = hinst
        wndclass.lpszClassName = "PreventShutdownWindowClass"
        wndclass.lpfnWndProc = messageMap
        myWindowClass = win32gui.RegisterClass(wndclass)
        hwnd = win32gui.CreateWindowEx(win32con.WS_EX_LEFT,
                                     myWindowClass,
                                     "PreventShutdownWindow", 
                                     0, 
                                     0, 
                                     0, 
                                     win32con.CW_USEDEFAULT, 
                                     win32con.CW_USEDEFAULT, 
                                     0, 
                                     0, 
                                     hinst, 
                                     None)
        print 'CreateWindowEx: ' + str(hwnd)
        print 'CreateWindowEx last error: ' + str(win32api.GetLastError())
        print ''

        # Set WndProc
        win32api.SetLastError(0)
        WndProcType = ctypes.WINFUNCTYPE(c_int, c_long, c_int, c_int, c_int)
        newWndProc = WndProcType(wndproc)
        oldWndProc = ctypes.windll.user32.SetWindowLongW( hwnd, win32con.GWL_WNDPROC, newWndProc )
        print 'SetWindowLong: ' + str(oldWndProc)
        print 'SetWindowLong last error: ' + str(win32api.GetLastError())
        print ''

        # We provide a reason for the shutdown prevention
        win32api.SetLastError(0)
        ret = ctypes.windll.user32.ShutdownBlockReasonCreate(hwnd, c_wchar_p("PreventShutdown running which prevents shutdown"))
        print 'ShutdownBlockReasonCreate: ' + str(ret)
        print 'ShutdownBlockReasonCreatelast error: ' + str(win32api.GetLastError())
        print ''

        # We elevate the program to be asked as soon as possible to inhibit shutdown
        win32api.SetLastError(0)
        win32process.SetProcessShutdownParameters(0x4FF, win32con.SHUTDOWN_NORETRY)
        print 'SetProcessShutdownParameters last error: ' + str(win32api.GetLastError())
        print ''

    except Exception, e:
        print("Exception: %s" % str(e))

    while True:
        win32gui.PumpWaitingMessages()
        time.sleep(1)