how to load 3d studio files in OpenGL?

Hello I am a newbie. My question:
In direct3D we can convert a .3ds file to a X file and load it in direct3D. How do I do such thing in OpenGL?
Thanks

Like in Direct3D do you have to use an external library or make your own loader. Here is some tutorials http://www.gametutorials.com/Tutorials/OpenGL/OpenGL_Pg3.htm

Good luck!