The OnClientFormCreated client-side event is called when the in-line editor or the edit form is about to appear.
Two parameters are passed to the event handler:
sender is the scheduler client object.
eventArgs has the following methods:
get_appointment() - returns the appointment instance.
get_formElement() - returns a reference to the form DOM element.
get_mode() - Enum of type Telerik.Web.UI.SchedulerFormMode.