ination of flag bits that specify which substitutions to
perform.  The flags <B>TCL_SUBST_COMMANDS</B>,
<B>TCL_SUBST_VARIABLES</B> and <B>TCL_SUBST_BACKSLASHES</B> are
currently supported, and <B>TCL_SUBST_ALL</B> is provided as a
convenience for the common case where all substitutions are desired.
<P></DL>
<H3><A NAME="M5">DESCRIPTION</A></H3>
The <B>Tcl_SubstObj</B> function is used to perform substitutions on
strings in the fashion of the <B><A HREF="../TclCmd/subst.html">subst</A></B> command.  It gets 