hpux man page for xthascallbacks

XtHasCallbacks()														  XtHasCallbacks()

Name
  XtHasCallbacks - determine the status of a widget's callback list.

Synopsis
  XtCallbackStatus XtHasCallbacks(object, callback_name)
	 Widget object;
	 String callback_name;

Inputs
  object      Specifies the object; may be of class Object or any subclass thereof.

  callback_name
	      Specifies the callback list to be checked.

Returns
  An XtCallbackStatus value.

Description
  XtHasCallbacks()  checks  the  widget  for  a  resource named callback_name.	If the resource does not exist or is not of type XtRCallback,
  XtHasCallbacks() returns XtCallbackNoList.  If the callback list exists but is empty, it returns XtCallbackHasNone.  If the  callback  list
  contains at least one callback procedure, it returns XtCallbackHasSome.

Structures
     typedef enum {
	 XtCallbackNoList,
	 XtCallbackHasNone,
	 XtCallbackHasSome
     } XtCallbackStatus;

See Also
  XtAddCallbacks(1), XtCallCallbacks(1), XtCallCallbackList(1).

Xt - Callbacks															  XtHasCallbacks()