Task Scheduler Run Vba

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Magnhild Lachowicz

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Aug 4, 2024, 10:00:00 PM8/4/24
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OnWindows 10, the Task Scheduler lets you create and run tasks automatically, and in this guide, I'll outline the steps to complete the process. Typically, the operating system and certain apps use the scheduler to automate maintenance tasks (such as disk defragmentation, disk cleanup, and updates). However, you can use it to automate your own tasks. For example, you can launch programs, run commands, and execute scripts at a specific time or trigger tasks when a specific event occurs.

The "powershell.exe" command and the above argument will run the script named "first_script.ps1." The argument "-ExecutionPolicy Bypass" ensures that the script runs successfully, and the "-NoExit" argument will prevent the window from closing after running the script. You can learn more about creating a PowerShell script in this guide.


Mauro Huculak has been a Windows How-To Expert contributor for WindowsCentral.com for nearly a decade and has over 15 years of experience writing comprehensive guides. He also has an IT background and has achieved different professional certifications from Microsoft, Cisco, VMware, and CompTIA. He has been recognized as a Microsoft MVP for many years."}), " -0-10/js/authorBio.js"); } else console.error('%c FTE ','background: #9306F9; color: #ffffff','no lazy slice hydration function available'); Mauro HuculakSocial Links NavigationMauro Huculak has been a Windows How-To Expert contributor for WindowsCentral.com for nearly a decade and has over 15 years of experience writing comprehensive guides. He also has an IT background and has achieved different professional certifications from Microsoft, Cisco, VMware, and CompTIA. He has been recognized as a Microsoft MVP for many years.


The Task Scheduler service allows you to perform automated tasks on a chosen computer. With this service, you can schedule any program to run at a convenient time for you or when a specific event occurs. The Task Scheduler monitors the time or event criteria that you choose and then executes the task when those criteria are met.


Task Scheduler is started each time the operating system is started. It can be run either through the Task Scheduler graphical user interface (GUI) or through the Task Scheduler API described in this SDK.


This topic and the other topics in this section are for a developer audience. For info about using the Task Scheduler component in your capacity as an administrator, or an IT Professional, see Task Scheduler in the Microsoft Dynamics 365 documentation.


The Task Scheduler enables you to automatically perform routine tasks on a chosen computer. The Task Scheduler does so by monitoring whatever criteria you choose (referred to as triggers) and then executing the tasks when those criteria are met.


Some examples of tasks that you can use the Task Scheduler to execute are: starting an application; sending an email message; or displaying a message box. You can schedule a task to execute in response to these triggers:


Task Scheduler (formerly Scheduled Tasks)[1] is a job scheduler in Microsoft Windows that launches computer programs or scripts at pre-defined times or after specified time intervals.[2][3] Microsoft introduced this component in the Microsoft Plus! for Windows 95 as System Agent.[4] Its core component is an eponymous Windows service.[5] The Windows Task Scheduler infrastructure is the basis for the Windows PowerShell scheduled jobs feature introduced with PowerShell v3.[6]


Task Scheduler can be compared to cron or anacron on Unix-like operating systems. This service should not be confused with the scheduler, which is a core component of the OS kernel that allocates CPU resources to processes already running.


Task Scheduler 1.0 is included with Windows NT 4.0[7] (with Internet Explorer 4.0 or later), Windows 2000,[7] Windows XP[8] and Windows Server 2003.[9] It runs as a Windows Service, and the task definitions and schedules are stored in binary .job files. Tasks are manipulated directly by manipulating the .job files. Each task corresponds to single action. On Windows 95 (with Internet Explorer 4.0 or later), Windows 98 and Windows Me, the Task Scheduler runs as an ordinary program, mstask.exe. It also displays a status icon in the notification area on Windows 95 and Windows 98 and runs as a hidden service on Windows Me, but can be made to show a tray icon.[1] Computer programs and scripts can access the service through six COM interfaces.[10] Microsoft provides a scheduling agent DLL, a sample VBScript and a configuration file to automate Task Scheduler.[11]


In addition to the graphical user interface for Task Scheduler in Control Panel, Windows provides two command-line tools for managing scheduled task: at.exe (deprecated)[12] and schtasks.exe.[5][13][14] However, at.exe cannot access tasks created or modified by Control Panel or schtasks.exe.[15] Also, tasks created with at.exe are not interactive by default; interactivity needs to be explicitly requested. The binary ".job" files which the AT command produces are stored in the %WINDIR%\Tasks directory.[16][17]


Task Scheduler 2.0 was introduced with Windows Vista[18] and included in Windows Server 2008 as well.[19][9] The redesigned Task Scheduler user interface is now based on Management Console. In addition to running tasks on scheduled times or specified intervals, Task Scheduler 2.0 also supports calendar and event-based triggers, such as starting a task when a particular event is logged to the event log, or when a combination of events has occurred. Also, several tasks that are triggered by the same event can be configured to run either simultaneously or in a pre-determined chained sequence of a series of actions, instead of having to create multiple scheduled tasks. Tasks can also be configured to run based on system status such as being idle for a pre-configured amount of time, on startup,[20] logoff, or only during or for a specified time. XPath expressions can be used to filter events from the Windows Event Log. Tasks can also be delayed for a specified time after the triggering event has occurred, or repeat until some other event occurs. Actions that need to be done if a task fails can also be configured. The actions that can be taken in response to triggers, both event-based as well as time-based, not only include launching applications but also take a number of custom actions. Task Scheduler includes a number of actions built-in, spanning a number of applications; including send an e-mail, show a message box, or fire a COM handler when it is triggered. Custom actions can also be specified using the Task Scheduler API. Task Scheduler keeps a history log of all execution details of all the tasks.[21] Windows Vista uses Task Scheduler 2.0 to run various system-level tasks;[22] consequently, the Task Scheduler service can no longer be disabled (except with a simple registry tweak).


Task Scheduler 2.0 exposes an API to allow computer programs and scripts create tasks.[19][23] It consists of 42 COM interfaces.[24] The Windows API does not, however, include a managed wrapper for Task Scheduler though an open source implementation exists.[25] The job files for Task Scheduler 2.0 are XML-based, and are human-readable, conforming to the Task Scheduler Schema.[19][23]


The Task Scheduler service works by managing Tasks; Task refers to the action (or actions) taken in response to trigger(s). A task is defined by associating a set of actions, which can include launching an application or taking some custom-defined action, to a set of triggers, which can either be time-based or event-based. In addition, a task also can contain metadata that defines how the actions will be executed, such as the security context the task will run in. Tasks are serialized to .job files and are stored in the special folder titled Task Folder, organized in subdirectories. Programmatically, the task folder is accessed using the ITaskFolder interface or the TaskFolder scripting object and individual tasks using the IRegisteredTask interface or RegisteredTask object.[26]


On Windows 2000 and Windows XP, when a computer is prepared for disk imaging with the sysprep utility, it cannot run tasks configured to run in the context of the SYSTEM account. Sysprep changes the security identifier (SID) to avoid duplication but does not update scheduled tasks to use the new SID. Consequently, the affected tasks fail to run. There is no solution for this problem but one may reschedule the affected tasks to work around the issue.[29]


I have a Task Scheduler job to run Robocopy for backing up local files to a network share. I have to use domain credentials to access the network share but the local computer is not on the domain, and the job is run as a local admin. This solution of temporarily mapping and unmapping the network share works but it leaves my password exposed in plain text for anybody who looks at the Task Scheduler job actions. I would prefer to map the network drive normally on a semi-permanent basis so the Task Scheduler job just has to run Robocopy and refer to the appropriate drive letter. However I always get the error "The system cannot find the path specified." in the Robocopy log when running this from Task Scheduler, even though the command works fine from an elevated command prompt (job is set to run with highest privileges). Also note I have done this registry tweak to access mapped drives from an elevated command prompt.


Years ago I created several .cmd scripts that would backup essential files for every system on the network this way. The only external program that I used was Cgywin's Grep command, and a command prompt smtp mail sender.


I made one script that would scan the network for systems. It would create a text file of all the system names, and alert me via email of any new systems that it found. (I had a config file that it would parse for systems to skip.) Each new system had a backup directory created for it and an backup configuration file placed in it. The user could modify this file and list any directories that needed backed up. They could also specify the time for their backups so it wouldn't happen when they were in the office. I ran this script on the server every 5 minutes, as it took no processing time and I like the security feature of alerting me when a new system was plugged into the network.

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