System.NullRefe renceException with unmanaged code wrapper

[Bruce]

I am using VC .NET 2003.

I created a simple unmanaged class in C++. The class is contained in a
library.

I then created a simple managed class wrapper that calls a function in
the unmanaged class. I am getting a System.NullRefe renceException when
instantiating the unmanaged class. What is causing this error?

Unmanaged code:

class TestClass
{
public:
TestClass(void) ;
~TestClass(void );
int RetunTest(void) ;
};
TestClass::Test Class(void)
{
}

TestClass::~Tes tClass(void)
{
}

int TestClass::Retu nTest(void)
{
return 10;
}
Managed Code:
#include "D:\Data\My Projects\VC\tes t\TestClass.h"

using namespace System;

namespace ManagedTest
{
public __gc class Class1
{
// TODO: Add your methods for this class here.
public:

Class1()
{
c = new TestClass(); //Error is occurring on this line
}
int CallUnmanged(vo id)
{
int x = c->RetunTest();
return x;
}

private:

TestClass *c;

};
}

[Bruce]

Never mind, I got it working.