# OnClientAppointmentWebServiceInserting

If specified, the **OnClientAppointmentWebServiceInserting** client-side event handler is called when an appointment is about to be stored via Web Service call. In the case of server-side binding, the event will not be raised.

Two parameters are passed to the handler:

* **sender** - the scheduler client object;

* **eventArgs** with two properties:

  * **get_appointment()** -the appointment that is about to be inserted.

  * **set_cancel()** - set to true cancel the operation.

This event can be cancelled.