I try to create windows service to write events win windows sessionswitch event, but when I make it in windows application it work fine but doesn't work with service.
After search I know the system events need message loop enabled so how I can enable it in vb.net windows service
In order to receive Windows Messages, your program must have a window. As noted on the SessionSwitch MSDN page:
In a Windows service, unless a hidden form is used or the message pump
has been started manually, this event will not be raised.
A link is included which gives an example showing how to receive these events with a hidden window. Message Only Windows are another, similar option for receiving window events and messages.
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I've created an SNMP listener application for one of our servers that runs as a service and passively listens for any SNMP message alerts sent from another server, and when one is received is sends out a page/email to appropriate staff. I followeda few online tutorials for setting up the application as a windows service since it needs to run constantly and won't require input/interaction from a user, or interaction with any GUI/desktop applications.
For some reason, when I install the application as a service, it installs correctly, but doesn't actually seem to be working. When SNMP messages are sent to the server nothing happens. However, in my app.publish folder there's an SNMPTrapper.exe application,and if I run that exe on its own, then everything works fine. For the time being I'm using a workaround so that the Onstart section of the code for the service basically just launches the SNMPTrapper.exe application, and when the service is stopped, it finds and kills the SNMPTrapper.exe process. At this point though, the service itself doesn't seem to be working/doing anything. It's essentially just a way to get the SNMPTrapper.exe application launched.
Does anyone know what the issue may be? In some of the tutorials I've read through they outline how to setup polling intervals for the service, but I don't think that would be applicable since this service will essentially just run constantly to listen for new messages, it won't need to check for anything at a regular interval.
Right now pretty much all of my code is executed in Sub Main() except for a few function calls.
Any help would be greatly appreciated.
You don’t state how you’re doing any of this. For a windows service you get two messages from the system: OnStart and OnStop. The job of OnStart is to set up all the required code to do the job, then exit. It doesn’t take part in the work so you need a Task or Thread setting up to do that. The Task or Thread should loop until it gets a message, passed by OnStop, that we’re done. If you want a service that you can test from the command line then your Main routine needs to do exactly the same setup, then wait for a key to be pressed before sending an OnStop.
(As an aside, you ARE remembering to start the service once you have installed it?)
I have got a vb.net windows service that runs a File System Watcher to monitor an xml file for changes, when it detects a change it will stop the screen saver running and what I would then like it to do is give one of the other running applications the focus.
I have successfully used Appactivate from a Windows Form App in the past but I think I am correct in saying this doesn't work with Windowless applications (I have tried it and it doesn't).
I have done some Googling but I can't seem to find any way of getting the focus when called from a service \ windowless app. Is this possible?
Thanks
what if you make it a single instance application? and then simply launch its .exe file? it might give focus to the other running application instead of opening a new instance.
I have built an application that connects to the exchange server and does some scanning tasks on the incoming mail.
Application has a form where i can start and stop scanning,give in an interval, do some other configuration, and a notificationicon in the taskbar to show hide,end and so on..
The problem is that I would like the application to start as a service, because now a user has to log in first on the server before it starts working.
I tried some tools like RunAsService, i had a service, but obviously it didn't run the application.
Of course i understeand now that when the application will run as a service, scanning will be the only thing that will happen, no forms and no notification icons.
However i do not know where to start, should i extract the scanning logic from my configuration as a separate application? What application type should it become then ?
You have two easy options.
First one just create a new Windows Service Project from your New Project button in the Visual Studio, and then just program your app.
Second one, just create a service from the service management window in your computer and add the executable file of your program. It will start running as a service (with visible windows and everything as you coded it).
You should follow this link and schedule your vb.net windows program as windows task
In Your code, at the end ,when everything gets executed you should write Me.Close() to hide your form.
I have a program that is written in VB.NET. It is currently interactive in that the user will click on some buttons on the form and click "GO" and it will do it's stuff.
I would like to set this up via a service on a Windows PC and instead of having user inputs via clicks have all the information in a config file.
It is my understanding that I can set this up as a service with some "parameters" on the call line, etc. and get other information from the config file.
Can someone advise me on how to do this?
Thanks
As far as I'm aware the software must have a ServiceInstaller class to install the service and a Service class that inherits from ServiceBase.
This would enable Windows to install, stop and start the service via the command line and services menu respectively.
Here's a simple example
You will need to make some small changes to convert your program to a Windows Service.
First, you will want to remove the user interface entirely - services shouldn't have a user interface.
You'd then build in the service plumbing required. Visual Studio includes a design experience specifically for creating Windows Services. For details on this, see the Creating a Windows Service Application in the Component Designer.
I want to keep a log with the attempted log-in to a machine. The OS is Windows Embbeded Standard. Is it possible to make Windows execute an application or a script after every login attempt to enable me to save that information in my database?
EDIT:
Extract from Superuser:
"Here, you can set auditing to all types of events. I believe the one you want is "Audit logon events", Set it to Failure (or Success as well if you want).
All events will now get sent to Event Viewer. ..."
Is it possible to access the Event Viewer info via WMI?
From a security viewpoint, I would assume this would not be possible. But it is possible to write your specialized GINA library which would replace the standard login system of Windows. This was done to support fingerprint readers and smart card readers, and many other alternative login methods.
But out of curiosity, what kind of problem are you trying to solve here? Windows already has plenty of build-in functionality which can be analysed by anyone who can log in.
Follow this link to see how it's done in Windows 2003. I've checked with Windows XP on a virtual machine and it works exactly the same there. So I assume it also works in embedded XP versions.For reading the event log, this link from MSDN will be practical too. This will require .NET though, which is optional on Windows XP.
WMI might be a good place to start. You could use WMI (or another method) to query the security event log for sucessful/failed logon events, too.
http://www.computerperformance.co.uk/vbscript/wmi_event_log_administrator.htm