csa_unregister_callback(3)

csa_unregister_callbackC3LIBRARY FUNCTIcsa_unregister_callback(3)

NAME
     csa_unregister_callback - unregister the specified	 callback
     functions

SYNOPSIS
     #include <csa.h>

     CSA_return_code csa_unregister_callback(CSA_session_handle	session,
					     CSA_flags reason,
					     CSA_callback callback,
					     CSA_buffer	client_data,
					     CSA_extension *unregister_callback_extensions);

DESCRIPTION
     The csa_unregister_callback() function removes the	specified
     callback procedure	to the specified callback list.	 Both the
     procedure and the client data must	match for  this	 function
     to	 remove	 the  procedure.   Specifying a	value of NULL for
     both callback and client data will	cause  all  callbacks  on
     the specified callback list(s) to be removed.

  Session (Session Handle)
     Opaque session handle that	represents  a  session	with  the
     calendaring service.

     Session handles are created by a  logon  function	call  and
     invalidated  with	a  logoff  function call.  If the session
     handle	 is	 invalid,      then	  the	    error
     CSA_E_INVALID_SESSION_HANDLE is returned.

  Reason (Flags)
     A bitmask of flags.   Unspecified	flags  should  always  be
     passed  as	 0.   Undocumented flags are reserved.	Each flag
     corresponds to a callback list.  Flag settings include:

	CSA_CB_CALENDAR_LOGON
	      If set, the new callback will be invoked when a the
	      calendar is accessed by a	user.

	CSA_CB_CALENDAR_DELETED
	      If set, the new callback will  be	 invoked  when	a
	      user requests that the calendar be deleted.

	CSA_CB_CALENDAR_ATTRIBUTE_UPDATED
	      If set, the new callback will be invoked whenever	a
	      calendar attribute is updated.

	CSA_CB_ENTRY_ADDED
	      If set, the new callback will be	invoked	 whenever
	      an entry is added	to the calendar.

	CSA_CB_ENTRY_DELETED
	      If set, the new callback will be	invoked	 whenever

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csa_unregister_callbackC3LIBRARY FUNCTIcsa_unregister_callback(3)

	      an entry is deleted from the calendar.

	CSA_CB_ENTRY_UPDATED
	      If set, the new callback will be	invoked	 whenever
	      an  entry	is updated on the calendar.  It	is imple-
	      mentation	specific  if  the  callback  function  is
	      invoked  before  or after	the specified update type
	      occurs.

  Callback (Callback)
     Specifies the client procedure that should	be  removed  from
     the specified callback list(s).

  Client Data (Opaque Data)
     A pointer to an application specific data structure that was
     specified	when the callback procedure was	registered.  This
     must match	for the	function  to  succeed.	 This  constraint
     allows the	application to register	the same function on more
     than one callback	list  with  different  client_data.   The
     instances of the callback function	on the different callback
     lists will	be treated independently by the	calendar service.

  Unregister Callback Extensions (Extension)
     A pointer to an array of CSA_extension structures	for  this
     function.	 The  array may	contain	both input extensions for
     providing additional information to the function and  output
     extensions	 for  receiving	information from the function.	A
     value of NULL indicates that the caller  is  not  using  any
     extensions.   See the extensions structure	for more informa-
     tion.

RETURN VALUE
  Unregister Callback Extensions (Extension)
     If	output extensions were passed  to  the	function  in  the
     extensions	list, the results from the service will	be avail-
     able in the extension.  See  the  extensions  structure  for
     more  information.	  Whether  the function	succeeded or not,
     and, if not, why.	It may be success or one  of  the  values
     listed under ERRORS below.

ERRORS
     The csa_unregister_callback() function returns the	following
     error values:

	CSA_E_CALLBACK_NOT_REGISTERED
	      The specified callback function was not registered.

	CSA_E_FAILURE
	      There was	a general failure that does not	 fit  the
	      description of any other error code.

	CSA_E_INSUFFICIENT_MEMORY

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csa_unregister_callbackC3LIBRARY FUNCTIcsa_unregister_callback(3)

	      Insufficient memory was available	to  complete  the
	      requested	operation.

	CSA_E_INVALID_FLAG
	      A	flag value in the flags	argument was invalid.

	CSA_E_INVALID_FUNCTION_EXT
	      The function extension requested is invalid.

	CSA_E_INVALID_PARAMETER
	      A	function parameter was invalid.

	CSA_E_INVALID_SESSION_HANDLE
	      The specified  Session  Handle  is  invalid  or  no
	      longer valid (e.g., after	logging	off).

	CSA_E_NO_AUTHORITY
	      The user has insufficient	authority for this  func-
	      tion.

	CSA_E_NOT_SUPPORTED
	      The operation requested is not  supported	 by  this
	      implementation.

	CSA_E_SERVICE_UNAVAILABLE
	      The requested calendar service is	unavailable.

	CSA_E_UNSUPPORTED_FLAG
	      The flag requested is not	supported.

	CSA_E_UNSUPPORTED_FUNCTION_EXT
	      The specified function extension is  not	supported
	      or CSA_EXT_REQUIRED is set.

SEE ALSO
     csacsa(5),	csa_add_calendar(3), csa_add_entry(3),
     csa_call_callbacks(3), csa_delete_calendar(3),
     csa_delete_entry(3), csa_free(3), csa_free_time_search(3),
     csa_list_calendar_attributes(3), csa_list_calendars(3),
     csa_list_entries(3), csa_list_entry_attributes(3),
     csa_list_entry_sequence(3), csa_logoff(3),	csa_logon(3),
     csa_look_up(3), csa_query_configuration(3),
     csa_read_calendar_attributes(3),
     csa_read_entry_attributes(3), csa_read_next_reminder(3),
     csa_register_callback(3), csa_update_calendar_attributes(3),
     csa_update_entry_attributes(3).

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