Atspi.EventListener.register_from_callback
Description: Reference for Atspi.EventListener.register_from_callback

### Function

# Atspi EventListenerregister_from_callback

#### Declaration [src]

    gboolean
    atspi_event_listener_register_from_callback (
      AtspiEventListenerCB callback,
      void* user_data,
      GDestroyNotify callback_destroyed,
      const gchar* event_type,
      GError** error
    )

#### Description [src]

Registers an `AtspiEventListenerCB` against an `event_type`.

#### Parameters

`callback`

  Type: `AtspiEventListenerCB`

  The `AtspiEventListenerCB` to be registered against an event type.

`user_data`

  Type: `void*`

  User data to be passed to the callback.

  The argument can be `NULL`.
  The data is owned by the caller of the function.

`callback_destroyed`

  Type: `GDestroyNotify`

  A `GDestroyNotify` called when the callback is destroyed.

`event_type`

  Type: `const gchar*`

  A character string indicating the type of events for which notification is requested. See #atspi_event_listener_register for a description of the format.

  The data is owned by the caller of the function.
  The value is a NUL terminated UTF-8 string.

`error`

  Type: `GError **`

  The return location for a recoverable error.

  The argument can be `NULL`.
  If the return location is not `NULL`, then you must initialize it to a `NULL` `GError*`.
  The argument will left initialized to `NULL` by the function if there are no errors.
  In case of error, the argument will be set to a newly allocated `GError`; the caller will take ownership of the data, and be responsible for freeing it.

#### Return value

Type: `gboolean`

`TRUE` if successfull, otherwise `FALSE`.