blitz types to c++?

I am wondering if anyone knew about this before, and if there is a better way to do it?

c++ header file:

class test
{
public:
	int x,y,z;
	float a,b;
};

c++ cpp file:

#include <stdlib.h>
#include <math.h>
//the header file
#include "testing.h"

#define BBDECL extern "C" _declspec(dllexport)

#define BBCALL _stdcall

BBDECL void BBCALL boo(test* obj)
{
	obj->a = 5.6f;
	obj->x = 4;
	obj->y = 5;
	obj->z = 6;
	obj->b = 10.9f;
}

the decls file in userlibs:

.lib "testing.dll"

boo(obj*):"_boo@4"

the blitz file:

Type test
	Field x,y,z
	Field a#,b#
End Type

t.test = New test
boo(t)

Print(t\a)
Print(t\b)
Print(t\x)
Print(t\y)
Print(t\z)
waitkey()
end

c++ code compiled in visual c++ 2005 express edition.
I am not sure if you can return a c++ class, all I have tried is passing a blitz type into the c++ class.

Lego is the best...