for HDCP monitor should I get HDMI or DVI cable?

I have HDCP compatible monitor and last week, I asked in futureshop about HDCP compatible cable but salesmen said this cables are only made for Television is it correct?

is it HDMI or is it something else that works with HDCP monitor?

can I plugin HDMI cable into the monitor?

how is HDMI cable different then DVI cable?

is it good investment getting HDMI cable?

can any one reccomend any good cables that suits my need, from this website!!

http://www.futureshop.ca/catalog/subclass.asp?logon=&langid=EN&catid=11349

I'm not 100% sure, but i think that the difference is that HDMI carries audio along with the video. Somebody correct me if I'm totally wrong.

You don't need to use HDMI for HDCP.
Just use a DVI cable.