PS Anti-aliasing

I'm wondering if anybody knows a good workaround for antialiasing curves in
Photoshop. I've been trying to make rounded rectangles by using the
"smooth" command, but that makes the corners jagged, especially on curves
that aren't arcs. I thought I might be able to use paths, but no luck there
either. Surely there's some command or something I'm missing - it seems
like too useful a thing to do without. Anyway, TIA, all advice and ideas
are appreciated.

-Adrian

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