currences of <I>macro_label</I> in the source file.</DD>
</DL>
The simplest form of the DEFINE directive might look like this:
<PRE>&nbsp;&nbsp;&nbsp; #DEFINE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MLABEL</PRE>
Notice that no substitutionary string is specified. The purpose of a statement
like this would typically be to define a label for the purpose of controlling
some subsequent conditional assembly (<A HREF="#IFDEF">IFDEF</A> or <A HREF="#IFNDEF">IFNDEF</A>).

<P>A more complicated example, perf