D</tt>, <tt>$BLUE</tt>, and
<tt>$GREEN</tt>.  Virtually all scripting languages provide C
functions for creating variables so installing constants is usually
a trivial exercise.
</p>

<H3><a name="Scripting_nn7">4.2.4 Structures and classes</a></H3>


<p>
Although scripting languages have no trouble accessing simple
functions and variables, accessing C/C++ structures and classes
present a different problem.  This is because the implementation
of structures is largely related to the problem of 
data represen