🚀 go-pugleaf

I found the text below but I couldn't understand it
Someone please tell me. thx
//-----------------------------------------
Respond correctly to Windows shutdown WM_QUERYENDSESSION
Posted: 21 Jan 2005 06:48 AM
I have an application which minimizes to systemtray when the close button is
pressed. How ever when shutting down windows the application keeps windows
from doing so.
I have made the following implementation i order to catch the windows
message WM_QUERYENDSESSION

protected override void WndProc(ref Message m)
{
    base.WndProc(ref m);
    // WM_QUERYENDSESSION
    if (m.Msg == 0x11) {
        //close up
        Application.Exit();
    }
}

Now my application shutsdown (I have checked in taskmanager) but still
windows keeps running. Second time I ask for a shutdown it works. So my
question is how do I respond correctly to the windows shutdown request?
//-----------------------------------------