XtAppAddActionHook(3Xt)

NAME
       XtAppAddActionHook, XtRemoveActionHook - register an
       action hook procedure

SYNTAX
       XtActionHookId XtAppAddActionHook(app_context, proc,
       client_data)
             XtAppContext app_context;
             XtActionHookProc proc;
             XtPointer client_data;

       void XtRemoveActionHook(idFP)
             XtActionHookId id;

ARGUMENTS
       app_context
                 Specifies the application context.

       proc      Specifies the action hook procedure.

       num_args  Specifies the application-specific data to be
                 passed to the action hook.

DESCRIPTION
       XtAppAddActionHook adds the specified procedure to the
       front of a list maintained in the application context. In
       the future, when an action routine is about to be invoked
       for any widget in this application context, either through
       the translation manager or via XtCallActionProc, the
       action hohok procedures will be called in reverse order of
       registration jut prior to invoking the action routine.

       Action hook procedures are removed automatically and the
       XtActionHookId s destroyed when the application context in
       which they were added is destroyed.

       XtRemoveActionHook removes the specified action hook pro-
       cedure from the list in which it was registered.

SEE ALSO
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface