Which is better to wear to a funeral? Any links and tips would help!?

Dress pants or a dress? It's an in door funeral. My uncle passed away this evening and his funeral is this week and I have NO black clothes that are suitable for a funeral. I'm into the classy look if that helps. Are heels appropriate? I'm big on heels but are they okay at a funeral? Any links to tops and pants or dresses that would work would be very much appreciated. Thanks ahead of time.