[C++-sig] trouble initializing module using Boost

[J.D. Yamokoski]

I have run into a compile error which is probably very easy to fix. I am 
trying to call PyImport_AppendInittab() to add the initialization of a 
module I have created with Boost. The exact details are of the call are:

// Register the extension module
if ( PyImport_AppendInittab("shapes", initshapes) == -1 ) {
		throw python_exception( "Failed to add shapes to the 	interpreter's 
builtin modules" );
}

// Initialize the Python interpreter
Py_Initialize();
....

I believe the module is defined correctly - I have used the module in 
the Python command line, just now trying to use it through the C-API. 
Here is the definition:

---- BoxModule.h ----
#include <boost/python.hpp>
#include "Box.h"
using namespace boost::python;

---- BoxModule.cpp ----
#include "BoxModule.h"

BOOST_PYTHON_MODULE(shapes)
{
    class_<Box>("MyBox")
	.add_property("height", &Box::getHeight, &Box::setHeight)
	.add_property("width",	&Box::getWidth,	&Box::setWidth)
	.add_property("length", &Box::getLength, &Box::setLength)
	.add_property("volume", &Box::getVolume, &Box::setVolume);
}

And finally, the compile error message is:

error C2065: 'initshapes' : undeclared identifier

So is initshapes put in a namespace? Or how do I pass this function to 
PyImport_AppendInittab()?