How to detect and abort system shutdown in c# windows application

[Subin Ninan]

I've tried using Microsoft.Win32.SystemEvents.SessionEnding event, but its not working as expected.
Any idea how to achieve this?

[Aimee Bailey]

Really bad of me that I find another cheap hack today, but here it is anyway, in winforms, you can handle the FormClosing event of a form, and call a little known console command that aborts shutdown like so...

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (e.CloseReason == CloseReason.WindowsShutDown)
            {
                Process.Start("shutdown", "-a");
            }
        }
    }
 

Best of luck!

Aimee.

[HaLo2FrEeEk]

Actually I would recommend catching the WM_QUERYENDSESSION message in WndProc. You can learn more about this message here:

http://msdn.microsoft.com/en-us/library/aa376890.aspx

Wile Aimee's method would work, it's more elegant to use Windows' message system.

[Subin Ninan]

That worked!!
Thanks, Aimee & Halo..