Is it possible automatically to run a fpc (or other) program when one clicks on the Start/Shut Down menu on the win9x desktop, before windoze start its shutdown sequence? How?

Does windoze look somewhere for a bat file called shutdown.bat ot whatever? Where? TIA for any info - think I should probably know this!

When Windows shutsdown by ExitWindows() or by ExitWindowsEx() it's send CTRL_SHUTDOWN_EVENT messages to processes... as far I remember, you should refer to Win32 SDK

I think you should write some small process monitoring this message and then quickly execute anything you want...

regards, Pavel Kanzelsberger

----- Original Message -----

CTRL_SHUTDOWN_EVENT is sent to console processes only. Imho it's better to create an invisible GUI process and monitor WM_QUERYENDSESSION because you don't have a dos box window hanging around then.

I think you should write some small process monitoring this message and then quickly execute anything you want...

The message handler could look like the following:

const
    done_my_stuff : Boolean = false;
function WindowHandler(wnd : HWnd; msg : DWord; wParam, lParam : Longint) :
Longbool;
begin
    case (msg) of
        WM_QUERYENDSESSION : begin
            // only execute user proc if not already done
            if (not done_my_stuff) then
                PostMessage(wnd, WM_USER, 0, lParam);
            // tell windows to 'abort' logoff if program
            // hasn't executed yet
            result := done_my_stuff;
        end;
        WM_USER : begin
            // you could as well spawn another process (call program) here
            Do_Your_Stuff_here;
            done_my_stuff := true;
            if ((lParam and ENDSESSION_LOGOFF)  0) then
                lParam := EWX_LOGOFF
            else
                lParam := EWX_SHUTDOWN;
            ExitWindowsEx(lParam, 0); // abort windows ourselves
            result := true;
        end;
        else begin
            result := DefWindowProc(wnd, msg, wParam, lParam);
        end;
    end;
end;

*Should work* (didn't verify). This doesn't work with W2k/NT - you need to get permissions whether you're allowed to shutdown the computer first before calling ExitWindowsEx with EWX_SHUTDOWN.
Refer to the SDK help how to do that, there's an example how to do that.

No. But there are already lots of tools available on the 'net which allow that.

Regards,
Thomas

Hi Lee,

Is it necessary for shutdown to call your program or can your program call shutdown. ExitWindowsEx should do the trick if running your app to shutdown windows is ok. This is in the windows unit. I don't have examples as I work in linux mostly.

HTH.