Copy Movies on Computer (?)

Good evening all,

Does anyone have any idea how I can transfer dvds movies onto my computer?

I have Windows Vista, Home Premium.  I also have Media Player and Center, Roxio, and Real Player.  None of these have instructions on how to transfer dvd movies onto the computer; only how to copy from dvd to dvd.  Real player has a "sinc" for CDs but not DVD's.

As always any help will be greatly appreciated.

Thank you,

Nissi1