Coding a Timer or Clock in C

[MaDHaVoK]

I am trying to create a timer.. that would start at 00:00:00:0 (HH:MM:SS:Tenth S) and go to 11:59:59.9 then reset to zero. My problem is I would like this to be accurate to the tenth of second... Any links where I could get help on this?

Thanks!
-Patrick