Copyright (C) 1994, Digital Equipment Corp.
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.