You couls use the Tooltip property in the Event and RecurringEvent to modify the displayed tooltip. One suggestions is to modify the tooltip during DataBound server side event handler. Here is the snippet, the tooltip is set to a static text:

protected void WebScheduler1_DataBound(object sender, ISNet.WebUI.WebScheduler.WebSchedulerDataBoundDataArgs e)
{
    switch (e.Type)
    {
        case WebSchedulerObjectType.Event:
            WebSchedulerEventBase evt = (WebSchedulerEventBase)e.DataObject;
            evt.Tooltip = "Mod Event Tooltip";
            break;
        case WebSchedulerObjectType.RecurringEvent:
            WebSchedulerRecurringEvent recEvt = (WebSchedulerRecurringEvent)e.DataObject;
            recEvt.Tooltip = "Mod Recurring Event Tooltip";
            break;
    }
}

Hi Glenn

    Thanks for your replay. It is working.

Thanks

Srikant

This topic helped me a lot on solving my similar question with the scheduler control. The scheduler tool tip is something that I am quite unfamiliar with. I perceive that I got to know a lot from this thread.