How to hide program's window when running as a Windows Task Scheduler scheduled task?

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I have created a task using C# code

C#

public void CreateSchedule()
        {
            string path = Directory.GetCurrentDirectory();
            path = path + "\\shedularEXE";
            using (TaskService ts = new TaskService())
            {
                // Create a new task definition and assign properties
                TaskDefinition td = ts.NewTask();
                td.Settings.MultipleInstances = TaskInstancesPolicy.IgnoreNew;
                td.RegistrationInfo.Description = "working with network failOver";
                td.Principal.LogonType = TaskLogonType.InteractiveToken;
                
                // Add a trigger that will fire the task at this time every other day
                DailyTrigger dt = (DailyTrigger)td.Triggers.Add(new DailyTrigger(1));
               // dt.Repetition.Duration = TimeSpan.FromMinutes(10);
                dt.Repetition.Interval = TimeSpan.FromHours(4d);

               
                // Add a trigger that will fire every week on FridayDaysOfTheWeek.Friday
                //td.Triggers.Add(new WeeklyTrigger(DaysOfTheWeek.AllDays, 1));//  + TimeSpan.FromHours(2), DaysOfWeek = DaysOfTheWeek.Friday });

                td.Actions.Add(new ExecAction(path ,"", null));
           

              //  td.Actions.Add(new ExecAction(@"C:\Users\Administrator\Documents\Visual Studio 2008\Projects\RunTask\shedularEXE\bin\Debug\shedularEXE", "", null));
                // Register the task in the root folder
                const string taskName = "Sync All Database";
                ts.RootFolder.RegisterTaskDefinition(taskName, td);
                // Retrieve the task, change the trigger and re-register it
                Task t = ts.GetTask(taskName);
                td = t.Definition;
                td.Triggers[0].StartBoundary = DateTime.Now.AddMinutes(10);//.Today;//+ TimeSpan.FromDays(7);
                ts.RootFolder.RegisterTaskDefinition(taskName, td);
                // ts.RootFolder.DeleteTask(taskName);
            }
        }

its working fine but my concern is that whenever task trigger is firing it will pop up one cmd window taskeng.exe.
I want to hide this command window.

Posted 12-Jun-13 23:24pm

lalit.mca2006

Updated 14-Jun-13 8:00am

Mike Meinz

v2

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Mike Meinz · Accepted Answer · 2013-06-13T00:05:00

This is the code that I used to test the Hidden attribute. I was unable to determine how to use Task Scheduler with the object names that are in your code above. The code below was developed using Visual Studio 2012 on a Windows 8 PC.

I found during my testing that the Hidden Attribute is not honored when _TASK_LOGON_TYPE.TASK_LOGON_INTERACTIVE_TOKEN is used in place _TASK_LOGON_TYPE.TASK_LOGON_PASSWORD when the task is registered.

public void CreateSchedule()
{
    ITaskService ts =new TaskScheduler.TaskScheduler ();
    ts.Connect();
        // Create a new task definition and assign properties
        ITaskDefinition td = ts.NewTask(0);
        td.Settings.MultipleInstances = _TASK_INSTANCES_POLICY.TASK_INSTANCES_IGNORE_NEW ;
        td.RegistrationInfo.Description = "working with network failOver";
        td.Principal.LogonType = _TASK_LOGON_TYPE.TASK_LOGON_GROUP;
        td.Settings.Hidden = true;
        // Add a trigger that will fire the task at this time every other day
        IDailyTrigger dt = (IDailyTrigger)td.Triggers.Create(_TASK_TRIGGER_TYPE2.TASK_TRIGGER_DAILY);
        dt.StartBoundary = DateTime.Now.AddMinutes(10).ToString("yyyy-MM-ddThh:mm:ss-06:00");
        dt.DaysInterval = 2; // Every other day
        IExecAction action =(IExecAction) td.Actions.Create(_TASK_ACTION_TYPE.TASK_ACTION_EXEC);
        action.Path = @"C:\windows\notepad.exe";
        // Register the task in the root folder
        const string taskName = "TESTING Sync All Database";
        ITaskFolder rootFolder = ts.GetFolder(@"\"); // Root Folder
        rootFolder.RegisterTaskDefinition(taskName,td,(int)_TASK_CREATION.TASK_CREATE_OR_UPDATE, "MyUsrName","MyPassword",_TASK_LOGON_TYPE.TASK_LOGON_PASSWORD );
        while (System.Runtime.InteropServices.Marshal.ReleaseComObject(rootFolder) != 0)
        {
        Application.DoEvents();
        }
        rootFolder = null;
        while (System.Runtime.InteropServices.Marshal.ReleaseComObject(dt) != 0)
        {
        Application.DoEvents();
        }
        dt = null;
        while (System.Runtime.InteropServices.Marshal.ReleaseComObject(action) != 0)
        {
        Application.DoEvents();
        }
        action = null;
        while (System.Runtime.InteropServices.Marshal.ReleaseComObject(td) != 0)
        {
        Application.DoEvents();
        }
        td = null;
        while (System.Runtime.InteropServices.Marshal.ReleaseComObject(ts) != 0)
        {
        Application.DoEvents();
        }
        ts = null;
        //
        // After all of the COM objects have been released and set to null, do the following:
        GC.Collect(); // Start .NET CLR Garbage Collection
        GC.WaitForPendingFinalizers(); // Wait for Garbage Collection to finish
}