 b)
% [b cget -f] -configure -a 3  # Same thing
</pre>
</div>

<p>
In many of these structure examples, a simple name like "v" or "b" has been given
to wrapped structures.  If necessary, this name can be passed to functions
that expect to receive an object.  For example, if you have a function like this,
</p>

<div class="code">
<pre>
void blah(Foo *f);
</pre>
</div>

<p>
you can call the function in Tcl as follows:
</p>

<div class="code">
<pre>
% Foo x            # Create a Foo object 
% blah x           