Trigger Types
The time-based and event-based triggers that are described below allow you to start tasks in a variety of ways.
Task Scheduler 2.0 Triggers
The following trigger types are defined by the TASK_TRIGGER_TYPE2 enumeration.
| Trigger | Description |
|---|---|
| Event trigger (event based trigger) For scripting development, see EventTrigger. For C++ development, see IEventTrigger. For XML development, see EventTrigger Element. |
Starts the task when a specific system event occurs. |
| Time trigger (time-based trigger)For scripting development, see TimeTrigger. For C++ development, see ITimeTrigger. For XML development, see TimeTrigger Element. |
Starts the task at a specific date and time. |
| Daily trigger (time-based calendar trigger)For scripting development, see DailyTrigger. For C++ development, see IDailyTrigger. For XML development, see CalendarTrigger Element. |
Starts the task at a specific time on a daily schedule. For example, the task starts at 8:00 AM every day or every other day. |
| Weekly trigger (time-based calendar trigger)For scripting development, see WeeklyTrigger. For C++ development, see IWeeklyTrigger. For XML development, see CalendarTrigger Element. |
Starts the task at a specific time on a weekly schedule. For example, the task starts at 8:00 AM on a specific day of the week every week or on a specific day of the week every other week. |
| Monthly trigger (time-based calendar trigger)For scripting development, see MonthlyTrigger. For C++ development, see IMonthlyTrigger. For XML development, see CalendarTrigger Element. |
Starts the task at a specific time on a monthly schedule. For example, the task starts at 8:00 AM on specific days of the month on specific months. |
| Monthly day-of-week (DOW) trigger (time-based calendar trigger)For scripting development, see MonthlyDOWTrigger. For C++ development, see IMonthlyDOWTrigger. For XML development, see CalendarTrigger Element. |
Starts the task at a specific time on a monthly day-of-week schedule. For example, the task starts at 8:00 AM on specific days of the week, weeks of the month, and months of the year. |
| Idle trigger (event-based trigger)For scripting development, see IdleTrigger. For C++ development, see IIdleTrigger. For XML development, see IdleTrigger Element. |
Starts the task when the computer enters an idle state. |
| Registration trigger (event-based trigger)For scripting development, see RegistrationTrigger. For C++ development, see IRegistrationTrigger. For XML development, see RegistrationTrigger Element. |
Starts the task when the task is registered or updated. |
| Boot trigger (event-based trigger)For scripting development, see BootTrigger. For C++ development, see IBootTrigger. For XML development, see BootTrigger Element. |
Starts the task when the system is booted. |
| Logon trigger (event-based trigger)For scripting development, see LogonTrigger. For C++ development, see ILogonTrigger. For XML development, see LogonTrigger Element. |
Starts the task when a user logs on. |
| Session state change trigger (event-based trigger)For scripting development, see SessionStateChangeTrigger. For C++ development, see ISessionStateChangeTrigger. For XML development, see SessionStateChangeTrigger Element. |
Starts the task when a Terminal Server session changes state. |
Task Scheduler 1.0 Triggers
The following trigger types are defined by the TASK_TRIGGER_TYPE enumeration. To implement any of the following triggers, see the TASK_TRIGGER structure.
- Once trigger: Starts the task a single time.
- Daily trigger: Starts the task on a daily interval.
- Weekly trigger: Starts the task on a weekly schedule.
- Monthly trigger: Starts the task on a monthly schedule.
- Monthly DOW trigger: Starts the task on a monthly day-of-week schedule.
- On Idle trigger: Starts the task when the computer is in an idle state.
- System Start trigger: Starts the task when the computer is booted.
- Logon trigger: Starts the task when a specific user logs on.