Will someone please explain how the state delegate system works?

[robinlynne]

I thought all the delegates from each state went to the winner of the race. I am an Edwards supporter. I am reading many articles saying that if we vote for Edwards, we will get him delegates. if that is true, then Edwards would recommend to his delegates who to vote for? if that is true, I would guess they go to Obama, and Edwards would be able to ask Obama to move a bit to the left, which sounds great.

on the other hand, it feels like if I vote for Edwards I might help Hilalry get elected, which I do not want to do.
And I thought that all the delegates from each state go to one candidate.
Can someone explain how the delegate process works? i knwo I should know this, but I'm confused.
Thank-you!