C#

// Get a ScheduledTasks object for the local computer.<br />
ScheduledTasks st = new ScheduledTasks();<br />
<br />
// Open a task we're interested in<br />
Task task = st.OpenTask("D checker");<br />
<br />
// Be sure the task was found before proceeding<br />
if (task != null) {<br />
    // Enumerate each trigger in the TriggerList of this task<br />
    foreach (Trigger tr in task.Triggers) {<br />
        // If this trigger has a start time, change it to 4:15 AM.<br />
        if (tr is StartableTrigger) {<br />
            (tr as StartableTrigger).StartHour = 4;<br />
            (tr as StartableTrigger).StartMinute = 15;<br />
        }<br />
    }<br />
    task.Save();<br />
    task.Close();<br />
}<br />
st.Dispose();