Windows shutdown. Get App to notice difference between close and shutdown

Hi, 

When my app is closed (cross clicked) it displays a dialog box asking 
whether you want to close or send app to standby

When windows shuts down, this dialog box pops up and windows 
displays "program not responding" 

I need my onCloseQuery procedure to notice the difference between the 
app closing and windows shutting down, so it can not display the 
dialog box if windows is shutting down. 

I have tried to use the following as an external procedure :-

procedure TMainForm.WMEndSession(var Msg: TWMEndSession);

begin
  if Msg.EndSession = TRUE then
    ShowMessage('Windows is shutting down ' + #13 + 'at ' +
  FormatDateTime('c', Now));
  inherited;
end;


This, and other variations of trying to read the windows message 
don't work as the app seems to ignore this section of code and just 
does the stuff in the onCloseQuery procedure 

Unfortunatly I can't debug an application when windows is shutting 
down so this is being very difficult

Thanks in advance for any help you can provide

Kind Regards 

Luke Wells


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