vbtkit/src/lego/ZSplitUtils.i3

 Copyright (C) 1992, Digital Equipment Corporation                         
 All rights reserved.                                                      
 See the file COPYRIGHT for a full description.                            
                                                                           
 Last modified on Mon Mar  1 15:23:51 PST 1993 by meehan 
      modified on Mon Feb  1 00:21:37 PST 1993 by mhb    
      modified on Tue Jun 16 13:07:56 PDT 1992 by muller 


 The ZSplitUtils interface contains utility procedures for working
   with ZSplits.  The ZChildVBT interface contains some additional
   utility procedures that are oriented for children of ZSplits that
   are used as subwindows. 


INTERFACE ZSplitUtils;

IMPORT VBT;

PROCEDURE FindZChild (v: VBT.T): VBT.T;

 Return the lowest (possibly improper) ancestor of v whose parent
   is a ZSplit.T and which is not the ZSplit.T's background child.
   If no such VBT is found, return NIL.  There's a good chance
   that the VBT returned is a ZChildVBT.T, but this is not
   required. 


END ZSplitUtils.