hpux man page for xtscreenofobject

XtScreenOfObject()														XtScreenOfObject()

Name
  XtScreenOfObject - return the screen pointer of a non-widget object.

Synopsis
  Screen *XtScreenOfObject(object)
	   Widget object;

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

Returns
  The screen of object, or if its nearest widget ancestor.

Availability
  Release 4 and later.

Description
  XtScreenOfObject()  is  identical  in  function  to  XtScreen()  if the object is a widget; otherwise XtScreenOfObject() returns the screen
  pointer for the nearest ancestor of object that is of class Core.

Usage
  If you are working with windowed objects, use XtScreen() rather than XtScreenOfObject().  XtScreen() may be  implemented  as	an  efficient
  macro for widget code that includes the file <X11/IntrinsicP.h>.

See Also
  XtDisplayOfObject(1), XtScreen(1), XtWindowOfObject(1).

Xt - Object Information 													XtScreenOfObject()