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Editorial Team
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Asked: 2026-05-24T12:08:40+00:00

Is there a known, reliable way to delay a user logging off once they

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Is there a known, reliable way to delay a user logging off once they have clicked the logout button? I am wondering about how I could go about delaying, or possibly cancelling the logout then logout through the application once the counter has expired.

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  1. Editorial Team

    When a logout is about to occur, the Windows message WM_QUERYENDSESSION is sent to all applicaitons. An application can reply to this message with a negative answer, asking for the logoff to be cancelled.

    From the MDSN doc:

    Applications should respect the user’s intentions and return TRUE. By
    default, the DefWindowProc function returns TRUE for this message.

    If shutting down would corrupt the system or media that is being
    burned, the application can return FALSE. However, it is good practice
    to respect the user’s actions.

    In .NET this functionality is exposed by the SystemEvents.SessionEnding event. If you set the Cancel property of SessionEndingEventArgs to true requests the logoff being cancelled.

    The logoff part has been asked before in Log off user from Win XP programmatically in C#.

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