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#67781 - 2002-07-03 07:49 PM Wanted - Object task scheduler functions
New Mexico Mark Offline
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Registered: 2002-01-03
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I realize jens wrote a function to schedule a task using jt.exe. However, I need a more generalized interface. Specifically, I would like to be able to:

1. Schedule a task.
2. Extract all information about a task.
3. Enumerate all tasks.
4. Return missed tasks.

I didn't realize this was a need until I tried to create a report on all the tasks I have scheduled on my system for training a co-worker.

It seems that Microsoft is almost ashamed of jt.exe. I can't find any documentation, and it isn't included in the most Win2k Pro or Win2K supplement resource kits. Besides, an object-oriented approach would be more standardized and less prone to obsolescence.

If anyone is interested in working on this one, I'd be willing to help with the coding and testing.

New Mexico Mark
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#67782 - 2002-07-03 07:59 PM Re: Wanted - Object task scheduler functions
Sealeopard Offline
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JT.EXE can do all this, if you're willing to go through the build-in documentation.
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#67783 - 2002-07-03 08:09 PM Re: Wanted - Object task scheduler functions
New Mexico Mark Offline
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Registered: 2002-01-03
Posts: 223
Loc: Columbia, SC
I started going through the built-in documentation, but I got frustrated when one command referenced help on SCE and jt /? SCE just returned the basic help. Arrrrggghh.

I'll pound on jt.exe a little more and see if I can get it to behave better.

Thanks,

NMM
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#67784 - 2002-07-03 08:43 PM Re: Wanted - Object task scheduler functions
Shawn Administrator Offline
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hmmm, theres a COM interface for Task Scheduler, but looks as if one has to jump through a bunch of hoops to get at it (or should I say - get it) ...

http://www.15seconds.com/Issue/980513.htm

-Shawn
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#67785 - 2002-07-03 08:44 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
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Registered: 2002-04-01
Posts: 895
The interesting thing about jt.exe is that you can do everything on a single commandline. You can create a job with the correct settings, add it to a computer, execute the job, and delete the job all in one line. I can spend some time on this if you'd like Mark.

Brian
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#67786 - 2002-07-03 08:52 PM Re: Wanted - Object task scheduler functions
New Mexico Mark Offline
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Registered: 2002-01-03
Posts: 223
Loc: Columbia, SC
I'd appreciate the help, Brian. It looks like /SCE is a critical argument in jt.exe, but it is undocumented.

Another reason I lean toward using the actual task scheduler object (if possible... I'll do more research) is that it doesn't require having another executable in the user's path.
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#67787 - 2002-07-03 08:54 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
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Registered: 2002-04-01
Posts: 895
I think the object is usable.. I'll work out some sample code for you.

Brian
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#67788 - 2002-07-03 09:11 PM Re: Wanted - Object task scheduler functions
New Mexico Mark Offline
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Registered: 2002-01-03
Posts: 223
Loc: Columbia, SC
The method shown in the web page Shawn referenced is giving me fits.

Server.CreateObject(""Scheduler.ShedulingAgent.1"") is a strange construction. Not to mention that KiXtart insists on interpreting the CreateObject after the period as the CreateObject function instead of a method of the $oServer object I created.
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#67789 - 2002-07-03 09:18 PM Re: Wanted - Object task scheduler functions
Shawn Administrator Offline
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Posts: 8611
Mark

Might want to try just the CreateObject by itself:

$Sched = CreateObject("Scheduler.ShedulingAgent.1")

But I would suggest a manual search in the root of HKEY_CLASSES_ROOT for the value "Scheduler.ShedulingAgent.1" - just to make sure its installed (just checked my XP machine - not there)

According to the web site there - the COMable DLL (TaskScheduler.dll) ships with Site Server [Frown]

[ 03 July 2002, 21:20: Message edited by: Shawn ]
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#67790 - 2002-07-03 09:20 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
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Registered: 2002-04-01
Posts: 895
I'm fiddling with it... apparently we need the server (asp) object functional.. still working on that.

Brian
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#67791 - 2002-07-03 09:52 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
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Registered: 2002-04-01
Posts: 895
So far no luck on the COM methods... still messing with it, though.

Brian
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#67792 - 2002-07-03 10:20 PM Re: Wanted - Object task scheduler functions
Kdyer Offline
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Registered: 2001-01-03
Posts: 6241
Loc: Tigard, OR
This looks pretty interesting..

http://cwashington.netreach.net/depo/view.asp?Index=496&ScriptType=vbscript
Uses a custom object from - http://home.sprintmail.com/~mpryor/

Prowling around on MSDN, we only see examples in C++ and not VB..

Hmm..

Kent
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#67793 - 2002-07-03 10:31 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
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Registered: 2002-04-01
Posts: 895
Phooey.. trying to find info on how to do this in COM seems tougher than manipulating JT.exe! [Smile]

Brian
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#67794 - 2002-07-03 10:31 PM Re: Wanted - Object task scheduler functions
New Mexico Mark Offline
Hey THIS is FUN
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Registered: 2002-01-03
Posts: 223
Loc: Columbia, SC
Gone for day... not ignoring anyone. Will be back Friday. Thanks!
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#67795 - 2002-07-03 10:50 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
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Registered: 2002-04-01
Posts: 895
After reading this, I think I may stick to jt.exe:

http://listserv.activestate.com/pipermail/perl-win32-users/2000-June/000404.html

Brian
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#67796 - 2002-07-03 11:17 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
Korg Regular

Registered: 2002-04-01
Posts: 895
Actually.. I have seen two different ActiveX wrappers for the task scheduler functions (in addition to the freeware one listed above):

1. http://www.etasoft.com/

2. http://www.altecdata.com/task_scheduler.htm

I wonder how hard it would be to write one of these..

Brian

[ 03 July 2002, 23:20: Message edited by: BrianTX ]
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#67797 - 2002-07-03 11:23 PM Re: Wanted - Object task scheduler functions
Shawn Administrator Offline
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Registered: 1999-08-13
Posts: 8611
Probably pretty easy - just rip the interface from one of those pricey ActiveX controls ... hmmm, thats got me to thinking, wonder if COM interfaces are "Copyright-able" - probably not - the implementation would be copyrighted software, but the interface itself ??? hmmm ... maybe ...
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#67798 - 2002-07-03 11:44 PM Re: Wanted - Object task scheduler functions
Kdyer Offline
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Registered: 2001-01-03
Posts: 6241
Loc: Tigard, OR
Did you get a chance to see this implementation?

http://home.sprintmail.com/~mpryor/tskfaq.htm

Here are KB's with regard to the Task Scheduler

http://home.sprintmail.com/~mpryor/makeKB.htm

Kent
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#67799 - 2002-07-03 11:48 PM Re: Wanted - Object task scheduler functions
BrianTX Offline
Korg Regular

Registered: 2002-04-01
Posts: 895
Now all I need is GCC to compile some C++ code.. (since I don't have visual C++) I noticed there is a lot of sample code on the MSDN site.

Brian
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#67800 - 2002-07-03 11:51 PM Re: Wanted - Object task scheduler functions
Kdyer Offline
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Registered: 2001-01-03
Posts: 6241
Loc: Tigard, OR
Here is some more with this..

Ref - http://www.planetsourcecode.com/vb/scripts/ShowCode.asp?txtCodeId=32831&lngWId=1
quote:

Allows you to use the windows task scheduler service to schedule task to run on the system.
This code was written in Japanese by another company and I re-wrote it in English.
It took me a while to find this one so I hope you all appreciate the research time
that has been put into doing this. Hope it's off use to some of you out there.
If you want to vote for this code please do so.
Kent
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