I'm not sure what kind of buttonhole stitch is best but here is one recommended by Amy Finlay at Knitting help.... a very helpful site. :)

Here is a link that might be useful: buttonhole..... scroll down

I do the one row buttone hole in the link......and if I think it's not neat enough I over cast the edges.
Linda C

10-20-05
You probably could do a machine buttonhole with sewing
machine but make sure you use grosgrain ribbon on the inside of band to prevent stretching. Hope this helps.