only variables and
will be accessed using the <tt>cvar</tt> object described in the previous section.  They
are not wrapped as constants.   For further discussion about this, see the <a href="SWIG.html#SWIG">SWIG Basics</a> chapter.
</p>

<p>
Constants are not guaranteed to remain constant in Tcl---the value
of the constant could be accidentally reassigned. You will just have to be careful.
</p>

<p>
A peculiarity of installing constants as variables is that it is necessary to use the Tcl <tt>global</tt> st