Sorting a CPtrArray: problems!

Ah hello.

I am trying to sort a CPtrArray of my own simple class.  This is based on the MSDN article at http://support.microsoft.com/kb/q216858/.  Code follows:

typedef int (__cdecl *GENERICCOMPAREFN)(const void * elem1, const void * elem2);
typedef int (__cdecl *STRINGCOMPAREFN)(const CMyClass * elem1, const CMyClass * elem2);

class CMyArray : public CPtrArray
{
public:
      void Sort(GENERICCOMPAREFN pfnCompare = Compare)
      {
            qsort ( this, GetSize(), sizeof ( CMyClass ), ( GENERICCOMPAREFN ) pfnCompare );
      }
protected:

      static int __cdecl Compare(const void * pMyClass1, const void * pMyClass2 )
      {
            if ( !pMyClass1 || !pMyClass2 ) return 0;
            CMyClass* pActualMyClass1 = (CMyClass*)pMyClass1;
            CMyClass* pActualMyClass2 = (CMyClass*)pMyClass2;

            return pActualMyClass1 ->m_dw < pActualMyClass2 ->m_dw;
      }
};

int main()
{
      CMyArray m_array;

      m_array.Add ( ( void*) new CMyClass ( 1 ) );
      m_array.Add ( ( void*) new CMyClass ( 3 ) );
      m_array.Add ( ( void*) new CMyClass ( 2 ) );

      m_array.Sort();

      return 0;
}

I would like to sort my array by the CMyClass object's DWORD member, in ascending order.

I am finding however that when Compare gets called, the DWORD value of the CMyClass object is like over 3386696!  Not what I initialised the object with when I added it to the array!  

Can someone explain what I am doing wrong here, and hence how to sort this array?