UI

Any recommendations for programming a user interface? I'm programming in C++ with visual studio. should I be using openGl or direct X for the said interface?

I know this is a stupid question really, but i'm a little bit confused.

>>9
Uni project, not aiming to make anything wonderful, just something that is capable of being used. I was planning on using DirectShow for actually playing the media, the aim of this is learning how things work, not making anything groundbreaking.

Would you suggest using directX for the interface?