Abort started shutdown - Windows 7

[j0kky]

Hi,

I'm trying to abort a started shutdown via start>>"Shut Down" on Windows 7 with but I can't find a solution.

It's simple to abort a timed-out shutdown thanks to "shutdown -a" or "AbortSystemShutdown" because (I think) that function only interrupt the timeout.

I've written this simple script (looking to previous posts about this argument): it is an idle loop that waits for WM_QUERYENDSESSION message and then it creates a block reason to stop the shutdown process. But an endless serie of error "the application was unable to start correctly (0xc0000142)" labelled "shutdown.exe" is shown and the shutdown is only paused, not aborted.

#Include <ButtonConstants.au3>
#Include <GUIConstantsEx.au3>
#Include <WinAPIEx.au3>

Opt('MustDeclareVars', 1)

Global $hForm, $Msg, $Button, $Check, $var = False

$hForm = GUICreate('MyGUI', 200, 200)
GUIRegisterMsg(0x0011, 'WM_QUERYENDSESSION')
GUISetState(@SW_HIDE)

_WinAPI_SetProcessShutdownParameters(0x03FF)

While 1
    $Msg = GUIGetMsg()
    _WinAPI_ShutdownBlockReasonCreate($hForm, 'something')
    If $var = True Then Run("C:\windows\system32\shutdown.exe -a")
WEnd

Func WM_QUERYENDSESSION($hWnd, $Msg, $wParam, $lParam)
    Switch $hWnd
        Case $hForm
            $var = True
            Return 0
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_QUERYENDSESSION

I'm beginning to think that what I want to do is impossible

Thanks to all. 

Edited April 9, 2014 by j0kky

[JohnOne]

Out of curiosity, Why?

[j0kky]

My family use my laptop and then they use to shutdown pc causing problems to execution of Vuze, BOINC, and other programs... So I would like to intercept ShutDown and convert it to Sleep.

Edited April 9, 2014 by j0kky

[JohnOne]

I'm quite sure Sleep will also stop those programs from running.

Can you not choose what option are in the shut down menu?

I'm sure I've seen them while using a lap top in control panel.

[j0kky]

Thank you for the answer!

With Sleep you can resume works where you have suspend them:

 

[...]sleep puts your work and settings in memory and draws a small amount of power[...]

From: http://windows.microsoft.com/

 

I've solved changing the default ShutDown button on start menu with Sleep but it is a sort of palliative.

Is there a way to automatically abort the shutdown with a script?

[JohnOne]

Probably, but I imagine it's a rather advanced and complicated endeavor.

Probably have more chance searching web for such a function before someone here takes it on.

Ok it's what you want. but if it were me it would not be worth the trouble, because I'd simply lock my laptop if other users did not respect my wishes not to shut it down.

Edited April 10, 2014 by JohnOne

[JohnOne]

To tackle the issue in a sensible way.

Make accounts for other users and set those accounts unable to shut it down.

Here is an article how to do it.

[j0kky]

This is a good solution... but not for me: I keep the laptop always on, logged in my account.

I'm not worried about the programming endeavor but I've gone over shutdown references on MSDN and it seems there is no functions good for this purpose.

Do you have any ideas?

Edited April 11, 2014 by j0kky

[Palestinian]

Install HandyCafe, you can't shut down a computer if the client is running

[j0kky]

Sorry but it is definetly not what I'm looking for!

[Bert]

So, you want your laptop available on demand, applications that are running to stay running, and keep your family from shutting down the laptop.

Why not just get them their own laptop and your problem is solved permanently? They can shut down to their heart's content, your stuff is not messed with at all and you don't need to worry about "custom" settings on your laptop. 

[j0kky]

ahahah, a bit too expensive solution   

Joking apart, I've red these "best practice" form MSDN:

 

• Applications should not block shutdown. Respond to WM_QUERYENDSESSION as quickly as possible and postpone cleanup activities until processing the WM_ENDSESSION message.
• Applications that must block shutdown should use the new ShutdownBlockReasonCreate function to register a string that explains the reason to the user. The user can decide whether to continue or cancel shutdown.
• Applications cannot rely on being able to block shutdown.

 

They don't tell us we can't do what I want, they tell us we just shouldn't... However they don't provide a direct function to abort the started shutdown   

[Bert]

How about this - setup separate profiles. The other profiles have the shutdown option revoked. Your profile is password protected. This is NO money to do, they don't mess with anything you have running on your profile and you don't mess with anything they have. Nice, simple, free, and no scripting needed.

[Unc3nZureD]

A small question:

Why do you loop

_WinAPI_ShutdownBlockReasonCreate($hForm, 'something')

a gazillion times? It needs to be called once only.

Edited April 12, 2014 by Unc3nZureD

[j0kky]

@Unc3nZureD: You're right, I've included it in the called function.

@MBALZESHARI: I have Windows 7 home premium and it hasn't Group Policy editor (Local Security Police snap-in)