//return true to avoid base.WndProc
//https://www.microsoftpressstore.com/articles/article.aspx?p=2201310&seqNum=3
public static bool ProcessShutdownMessage(IntPtr hWnd, ref Message m)
{
ParseAndLogShutdownParameters(ref m);
if (AbortShutdownIfScheduled && m.Msg == (int)Win32_Shutdown.eMsg.WM_QUERYENDSESSION)
{
Win32_Shutdown.ShutdownBlockReasonCreate(hWnd, "Block Unexpected Shutdown!");
Utils.Log.WriteLineF("ProcessShutdownMessage: ShutdownBlockReasonCreate(hWnd = 0x{0:X8})", (uint)hWnd);
DialogResult res = MessageBox.Show("Allow Windows Shutdown/Reboot/Log off?", Environment.UserName,
MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1, MessageBoxOptions.ServiceNotification);
if (res == DialogResult.Yes)
{
Utils.Log.WriteLineF("Allow Windows Shutdown/Reboot/Log off...");
Win32_Shutdown.ShutdownBlockReasonDestroy(hWnd);
return(false); //Allow Windows to shutdown
}
return(AbortShutdownIfScheduled); //don't call base.WndProc if aborting
}
return(false); //Allow Windows to shutdown
}
private static void ProcessShutdownIfDetected()
{
int error_code = (int)Win32_Shutdown.InitiateShutdown(null, "Testing for Shutdown",
1024 * 1024,
Win32_Shutdown.ShutdownFlags.SHUTDOWN_RESTARTAPPS,
Win32_Shutdown.ShutdownReasons.SHTDN_REASON_MAJOR_APPLICATION |
Win32_Shutdown.ShutdownReasons.SHTDN_REASON_MINOR_INSTALLATION |
Win32_Shutdown.ShutdownReasons.SHTDN_REASON_FLAG_PLANNED);
if (error_code == 0) //succeded to schedule shutdown - abort and continue
{
AbortSystemShutdown(null);
}
else if (error_code == Win32_Shutdown.ERROR_SHUTDOWN_IS_SCHEDULED) //this is what I am expecting to abort
{
AbortSystemShutdown(null);
Utils.Log.WriteLineF("Shutdown schedule was detected and aborted!!!");
}
else
{
Win32Exception e = new Win32Exception(error_code);
Utils.Log.WriteLineF("Error Detecting Shutdown: " + e.Message);
}
}
public static int AbortSystemShutdown(string lpMachineName = "")
{
return(Win32_Shutdown.AbortSystemShutdown(lpMachineName));
}