Develop ATL Control for use in Navision

Hi, I have develop a very simple ATL Control using the tutorial provided by MSDN Library. And it works fine when I test it using the Activex Control Test Container. Now I’ll like to use this COM in navision. I did see the COM object in navision and I also see the 2 properties I defined. However, I don’t know how to get the Triangle to display out. Any advice?