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amin84

Tray Menu Interrupts _WinAPI_ShutdownBlockReasonCreate()

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Hello,

I'm experiencing strange behavior with _WinAPI_ShutdownBlockReasonCreate().

I have this simple script that you can _WinAPI_ShutdownBlockReasonCreate() and _WinAPI_ShutdownBlockReasonDestroy() using Ctrl + Shift + T. When _WinAPI_ShutdownBlockReasonCreate() is called, it will stop system from restarting.

Here is the problem.

  • Run this code and it will be disabled by default (computer will log off or restart).
  • Press Ctrl + Shift + T to enable it which it will do _WinAPI_ShutdownBlockReasonCreate().
  • Now if you try to log off, it won't be able to and it will show that this program needs to close.
  • Press cancel to go back to desktop.
  • If you try to log off again, _WinAPI_ShutdownBlockReasonCreate() still exists which will stop you as expected.
  • Click on the tray icon to open the menu and click anywhere on the desktop to cancel the menu.
  • Now try to log off and it will log off which it should not!

_WinAPI_ShutdownBlockReasonCreate() doesn't exists anymore after opening the tray menu! Anybody knows what happens to _WinAPI_ShutdownBlockReasonCreate() when tray menu opens?

Here is the code:

#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_UseX64=n
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
#include <Constants.au3>
#include <StaticConstants.au3>
#include <Misc.au3>
#include <WinAPISys.au3>
#include <ButtonConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GuiComboBox.au3>

Global $enabled = False

Opt('TrayMenuMode',3)
Opt('TrayAutoPause',0)
Opt("GUICloseOnESC", 0)

HotKeySet('^+t','_guard')

Global $g_hForm = GUICreate('DUMMY GUI', 200, 200)
GUIRegisterMsg($WM_QUERYENDSESSION, 'WM_QUERYENDSESSION')
_WinAPI_SetProcessShutdownParameters(0x03FF)
;menu
$aboutTray = TrayCreateItem('DEMO')
TrayItemSetState(-1,$TRAY_DISABLE)
TrayCreateItem('')
$enableTray = TrayCreateItem('Enabled'&@TAB&'Ctrl + Shift + T')
TrayCreateItem('')
$settingsTray = TrayCreateItem('Settings...')
TrayCreateItem('')
$exitTray = TrayCreateItem('Exit')
TraySetState()
;settings
$gui = GUICreate("DEMO Settings", 386+7, 114+93, -1, -1, $WS_SYSMENU)

TrayTip("", "DISABLED", 0)

Func _guard()
    If Not $enabled Then ;enable it
        $enabled = True
        _WinAPI_ShutdownBlockReasonCreate($g_hForm, 'This application is blocking system shutdown because the saving critical data is in progress.')
        TrayItemSetState($enableTray,$TRAY_CHECKED)
        TrayTip("", "ENABLED", 0)
    Else
        $enabled = False
        _WinAPI_ShutdownBlockReasonDestroy($g_hForm)
        TrayItemSetState($enableTray,$TRAY_UNCHECKED)
        TrayTip("", "DISABLED", 0)
    EndIf
EndFunc

While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            GUISetState(@SW_HIDE, $gui)
    EndSwitch
    $tMsg = TrayGetMsg()
    Switch $tMsg
        Case $enableTray
            _guard()
        Case $exitTray
            Exit
    EndSwitch
WEnd

Exit

Func WM_QUERYENDSESSION($hWnd, $Msg, $wParam, $lParam)
    Switch $hWnd
        Case $g_hForm
            If _WinAPI_ShutdownBlockReasonQuery($g_hForm) Then
                Return 0
            EndIf
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc

Any help is much appreciated.

Thanks.

Edited by leomoon

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It seems that AutoIT does not allow toggle between _WinAPI_ShutdownBlockReasonCreate and _WinAPI_ShutdownBlockReasonDestroy using system tray directly.

Something happens to _WinAPI_ShutdownBlockReasonCreate as soon as the system tray is clicked and _WinAPI_ShutdownBlockReasonCreate no longer works!

Is there anyway to toggle it indirectly using system tray?

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