emacs: syntax highlighting

[daniel_I_l]

When I open a C file with emacs it's properly highlighted. But how can I get syntax highlighting in a new file? I tried turing on "font-lock-mode" and it didn't help. One site said to click on "options" in the toolbar and then check a box that says "enable highlighting" or something like that but I don't have that box.
Any ideas?
Thanks.

[RupertPupkin]

That should happen automatically when you name the file with a .c extension. If not, then just do this:
ESC-x c-mode

If that doesn't work, put this in your ~/.emacs:

(add-hook 'c-mode-hook 'turn-on-font-lock)