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How to activate a program during shut down?

Posted on 1997-09-17
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I would like to activate a program whenever shut down the system.  Something similar to .logoff in Unix.
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Question by:cwchaw
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smeebud earned 20 total points
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You need, or would be well served using a boot manager. There are quite a few out there, some Free.
Bootmngr.exe is one I use. Write 100634,3111@Compuserve.Com
Or in your Reskit on your 95 CD, you'll find several working examples.
For more, if you need help, comment back please
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by:ipd
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download pwshut.zip from www.winmag.com/library/1997/0601/howto155.htm
I suppose this program will do your stuff
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by:smeebud
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ipd and cwchaw,
Pwshut.zip is a real gem, and it's free. Thanks for the information.
----------Here's what it says about it;
Do the Shutdown Shuffle
You can automatically wake up certain programs before putting
Windows to sleep.

Download PWSHUT.ZIP.

Since Windows 3.1, you've been able to make programs run automatically
each time Windows starts. With Win3.1, you placed "Program Items" in
the old Program Manager's StartUp group. With Windows 95, you can
place shortcuts to programs in the StartUp folder.

That works fine for those who like to do everything early. You know who
you are. When you wake up in the morning, every hair's already in place.
And a cup of coffee would make you too perky.

But what about us slow starters who put everything off until the last minute?
What we need is a Shutdown group, a way to run programs automatically
just before Windows exits. For us, I wrote PWShut, the WinMag
Shutdown group. It's available from any of WinMag's download locations
(listed in the table of contents)

PWShut is easy to use. First, create a directory named Shutdown within
your Windows 95 directory. For example, if Windows is installed in
C:\WINDOWS, create a directory named
C:\WINDOWS\SHUTDOWN.

Inside this new directory, create shortcuts to the programs you'd like run
just before Windows exits. These might take care of system maintenance,
put time stamps on documents, perform housekeeping chores while
cleaning out temp files or check on whether a certain program is still
running. You can store executable files, such as EXE, COM and BAT
files, in the Shutdown directory. BAT files can be useful when a group of
programs or DOS commands must be run in a particular order. Just list the
commands in your desired order within the batch file. Precede each batch
file line with Start /wait to ensure that each command finishes before the
next one starts. For example, to run a program named XYZ.EXE, the
batch file line would look like this: Start /wait XYZ.EXE.

Both batch files and shortcuts have properties that you may want to edit.
To do so, right-click on the shortcut or batch file's icon, then select
Properties from the Context menu. The more useful shortcut properties
include Target and Run, both on the Shortcut tab of the Properties dialog.
Target specifies the full command used to launch the shortcut's program,
including any command-line parameters. The Run property determines the
size of the program's initial window (Maximized, Minimized or Normal)

Batch files have a Run property, too, found on the Program tab of the
batch file's Properties dialog. The same tab of the dialog contains the Cmd
Line property, which is the full name of the batch file, followed by any
command-line parameters it needs. Another useful batch file property is the
Close on Exit checkbox. When checked, Close on Exit causes the batch
file's window to disappear after all its commands have been executed. If
this box isn't checked, you'll probably have to manually close the batch
file's window after each run.

Once you store everything safely in the Shutdown directory, place a copy
of PWSHUT.EXE in your Windows directory and a shortcut to it in your
StartUp group.

Now when Windows starts, a copy of PWShut will automatically load.
Until you ask Windows to exit, PWShut will sit quietly, showing just an
icon on your taskbar. But when you order Windows to shut down,
PWShut flies into action.

PWShut's first act is to cancel the pending shutdown (more about that
later). Then, PWShut scans your Shutdown directory and executes each
program and batch file it finds. It runs each program in the order it finds
them, one at a time. That means a new program doesn't start until the
previous program finishes. Once all the programs in your Shutdown group
finish, PWShut finally causes Windows to exit.

Debugging

PWShut provides one feature the Windows StartUp folder lacks.
Normally, PWShut works invisibly. But if you execute it with the
command-line parameter /debug, it will display its main window as it
processes the Shutdown directory. As you can see in the sidebar, "A Real
Turnoff," the main window includes a list box that displays PWShut's
progress.

The first line displayed tells us that PWShut is operating in Debug Mode
and waiting for Windows to initiate a shutdown. Once the shutdown is
requested, PWShut tells us which directory it is scanning (usually
C:\WINDOWS\SHUTDOWN), then displays one line for each program it
runs. If a program can't be executed, you'll see an additional line that states
[Program name] Failed.

The /debug parameter also alters PWShut's behavior in another useful way.
While running in Debug mode, PWShut will not let Windows shut down.
That makes it a lot easier to run multiple tests.

We've already peeked inside PWShut's bag of tricks. Back in January
1996 we described a Power Windows utility named PWScan that showed
how a program could discover the contents of a directory. We used the
same technique in the Matchmaker utility (See Power Windows, May).
We've also seen how one program can launch another, most recently in
January when examining PWOne, the WinMag Instance Limiter. But
PWShut has a few tricks of its own. Let's take a moment and look at one
of the more interesting ones.

Back when I was in school, you could get into a lot of trouble for doing
what Windows does thousands of times a day. Windows is notorious for
passing messages. Windows applications need these electronic missives to
know when you've pressed a key, moved or clicked your mouse, or when
you want to shut down Windows.

Windows passes these messages to your program by calling a message
handler, a special function written for just this purpose. This function
accepts four parameters: a window handle, a message ID, lParam and
wParam. The window handle is a number that identifies the window
affected by the message. A message ID is a single 16-bit number that
defines the type of message being sent. The last two parameters, lParam
and wParam, often provide the message handler with additional information
related to a message.

One Windows message, which is called WM_QUERYENDSESSION, is
of special interest to PWShut. It is sent to all running Windows applications
whenever a user or another application orders Windows to shut down, or
whenever a user asks to log off. This warning message alerts programs to
save files and wrap up their work.

Now, remember that message handlers are functions. This means they
return a value to Windows after processing each message. In the case of
WM_QUERYENDSESSION, if all programs' message handlers return a
non-zero value, the shutdown or log-off will take place as requested. But if
even one message handler returns a value of zero, it cancels the shutdown.

That's exactly how PWShut responds to the first
WM_QUERYENDSESSION message it receives. It returns a value of
zero, preventing the shutdown. This reprieve allows PWShut to scan your
Shutdown directory and run all the programs it finds. Once that job is
done, PWShut calls a special Windows function named ExitWindows to
trigger a second shutdown attempt. This time around, PWShut doesn't veto
the shutdown, allowing it to take place if all other running applications
concur.

You may be wondering why PWShut doesn't just do all its work within its
message handler after receiving the WM_QUERYENDSESSION
message, but before returning a value to Windows. If our program could
get all its work done there, it wouldn't need to block the first shutdown
attempt, then initiate a second attempt. Unfortunately, this plan won't work
for several reasons.

First, Windows does its best to prevent new programs from being
launched once WM_QUERYENDSESSION messages have been sent.
Windows hides all icons and disables the Desktop (makes it ignore mouse
clicks and keystrokes), effectively preventing you from launching a new
program. A running program, like PWShut, can still start another program.
But the new program won't run until the parent program finishes. This
prevents PWShut from launching more than one program in the Shutdown
group and defeats its efforts to monitor launched programs as they run.

Windows plays one other nasty trick on programs that have received a
WM_QUERYENDSESSION message. If the program's message handler
doesn't respond in a reasonable amount of time (usually about 30
seconds), Windows will exit anyway. Since there's no way PWShut can
guarantee all the programs in the Shutdown group will finish within 30
seconds, Windows might disappear before all shutdown processing is
complete.

Rough edges

PWShut does its job well, but like most new programs, it has a few rough
edges. For now, all users of a PC share a common Shutdown directory.
This means the work done at shutdown is the same, regardless of who's
logged on. This problem could be fixed by having PWShut ask Windows
for the name and directory of the currently logged-on user. PWShut could
then search a user's private Shutdown directory, in the same way Windows
accesses an individual user's StartUp directory.

The many flavors of shutdowns also pose a problem. Under Windows 95,
you can log off, restart the computer, restart the computer in MS-DOS or
simply shut down Windows.

PWShut doesn't always know what type of shutdown to request when
calling ExitWindows. In the current version, it asks for a log-off if that's
what the user originally requested and asks for a restart of Windows in all
other cases. Fortunately, it's perfectly safe to turn off the computer during a
restart, as long as it's done during the BIOS POST phase (while the
memory size is being calculated and so on). We can smooth these rough
edges with some tweaking. Look for that to happen in a future version of
PWShut. In the meantime, download the program, have a few cups of
coffee and give it a try.

Karen Kenworthy is the author of Visual Basic for Applications, Revealed!
(Prima Publishing, 1994), a nonprogrammer's introduction to VBA. She is
also a contributing editor to WINDOWS Magazine and the manager of
WINDOWS Magazine Online on America Online and CompuServe.
Reach Karen care at the e-mail address here.

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