LINE</B>,
<B>TCL_REG_NLSTOP</B>, <B>TCL_REG_NLANCH</B>, <B>TCL_REG_NOSUB</B>, and
<B>TCL_REG_CANMATCH</B>. See below for more information.
<P><DT>int <B>offset</B> (in)<DD>
The character offset into the text where matching should begin.
The value of the offset has no impact on <B>^</B> matches.  This
behavior is controlled by <I>eflags</I>.
<P><DT>int <B>nmatches</B> (in)<DD>
The number of matching subexpressions that should be remembered for
later use.  If this value is 0, then no subexpression match
infor