How do you use a contour brush with eyeshadow?

and is that something you use to create a smokey eye.How do you use a contour brush with eyeshadow?
to create a smokey eye look, use a gray shadow, close your eye, and make a C shape at the outside coner of your eyelash base in the crease of your eye- to the nose area. Any small brush will do.How do you use a contour brush with eyeshadow?
Dude I really dont know or care!!!! lol jk- you take a really small brush and sink it with water then straighten it.