code on shutdown

[n3v]

I'm trying to figure out how to make my program execute some code (eg. save files) if the computer is shutting down. is that possible?

how does the computer shut programs when it's shutting down?
if i put some code into the exit function, would it run when the computer shuts down?

[Tonto]

The system sends a WM_QUERYENDSESSION to the main window of each running application.

Windows Me/98/95: The system sends a WM_QUERYENDSESSION to all applications except calling application.

An application agrees to terminate by returning TRUE when it receives this message (or by allowing the DefWindowProc function to process the message). If any application returns FALSE when it receives the WM_QUERYENDSESSION message, the shutdown is canceled.

After the system processes the results of the WM_QUERYENDSESSION message, it sends the WM_ENDSESSION message with the wParam parameter set to TRUE if the system is shutting down and to FALSE if it is not.

http://msdn.microsoft.com/library/de...endsession.asp

For console programs

http://msdn.microsoft.com/library/de...trlhandler.asp

[n3v]

so wait, it's actually possible to stop the computer from shutting down by returning a false?

[Wraithan]

Aye that is what the documentation says. Ever had a file open in an editor and say cancle to shutting program when you said to shutdown the computer and it cancled the shutdown.