>># 
>># Copyright 1990, 1991 by the Massachusetts Institute of Technology and
>># UniSoft Group Limited.
>># 
>># Permission to use, copy, modify, distribute, and sell this software and
>># its documentation for any purpose is hereby granted without fee,
>># provided that the above copyright notice appear in all copies and that
>># both that copyright notice and this permission notice appear in
>># supporting documentation, and that the names of MIT and UniSoft not be
>># used in advertising or publicity pertaining to distribution of the
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>># $XConsortium: plnsofscrn.m,v 1.4 92/06/11 16:01:14 rws Exp $
>># 
>>#
>>TITLE PlanesOfScreen CH02
>>ASSERTION A PlanesOfScreen-1
A call to PlanesOfScreen returns the depth of the root
window of the screen screen.
>>STRATEGY
Obtain the depth of the root window of the default screen using PlanesOfScreen.
Obtain the depth of the root window of the default screen using XGetWindowAttributes.
Verify that the depths are the same.
