Simple way of detecting shutdown?

[Rich]

I have a simple, single threaded program in C++ that runs as Idle
priority.
The program creates some data which needs dumping to file if the
computer is shutdown or logged out.

At the moment there is almost no Win32 code in it (only a few lines to
do the idle priority class). What is the simplest way of
programatically detecting the shutdown so I can dump my data to file?
I would rather not put masses of Win32 code in there, is there
anything, more simple than the message-loop/windowproc method?

Cheers,
Rich.

 

[JKop]

Rich posted:

I have a simple, single threaded program in C++ that runs as Idle
priority.
The program creates some data which needs dumping to file if the
computer is shutdown or logged out.

At the moment there is almost no Win32 code in it (only a few lines to
do the idle priority class). What is the simplest way of
programatically detecting the shutdown so I can dump my data to file?
I would rather not put masses of Win32 code in there, is there
anything, more simple than the message-loop/windowproc method?

Cheers,
Rich.

GetMessage I believe is the only way to go on this.

Post to:

comp.os.ms-windows.programmer.win32
microsoft.public.win32.programmer.kernel
microsoft.public.win32.programmer.ui
microsoft.public.win32.programmer.messaging
and,(this isn't a typo
microsoft.public.win32.programmer.messsaging

I suggest "ui" because "GetMessage" is in "User32.dll" ( I
think... )

-JKop

 

[Victor Bazarov]

[..OS-specific question snipped..]

Please refrain from cross-posting non-C++ language questions
to comp.lang.c++. They are off-topic here. Thank you.

 

[BigJet]

ADD this to your Window Proc, case WM_DESTROY:
-- PLACE YOUR FILE SAVE CODE
HERE -
PostQuitMessage (0)
;
return 0;

Good luck
--jet

 

[Rich]

[..OS-specific question snipped..]

Please refrain from cross-posting non-C++ language questions
to comp.lang.c++. They are off-topic here. Thank you.

It was cross posted in case there was some C/C++ language way of doing
this I did not know about!
Perhaps using signal.h and SIGTERM?

SORRY!

 

[Bruce the Shark]

What is the simplest way of programatically detecting the shutdown

Check for the WM_ENDSESSION message -- it means Windows is going bye-bye.
http://msdn.microsoft.com/library/en-us/sysinfo/base/wm_endsession.asp