🚀 go-pugleaf

"Mark Jacobs" <http://www.jacobsm.com/mjmsg.htm?Borland%20Newsgroup>
wrote:

>I have an application that sits in the system tray and monitors the registry. I
>use the OnCloseQuery event for the form to trap closure and prompt for a Yes or
>No response. However, when the PC system is shut down or rebooted, the prompt is
>interfering with proper shutdown. How can I get the app to recognise the source
>of the closure request and bypass the prompt if it is system-originated?

LRESULT CALLBACK WindowProc(
  HWND hwnd,          // handle to window
  WM_QUERYENDSESSION, // the message to send
  WPARAM wParam,      // not used
  LPARAM lParam       // logoff option
);

lParam
If this parameter includes ENDSESSION_LOGOFF, the user is logging off.
(Note that this parameter is a bit mask. To test for this value, use a
bit-wise operation; do not test for equality.) 

If this parameter is zero, the system is shutting down or restarting (it
is not possible to determine which event is occurring).

Alan Bellingham
-- 
Me <url:mailto:alanb@episys.com> <url:http://www.doughnut.demon.co.uk/>
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