Arrays will help you alot in this situation,Being that a tic-tac-toe board only has 6 slots it should be fairly easy to make logic for such a project.
Arrays are your best friend,trust me i was really depressed before i found my friend Array.It will help you figure out how to draw tiles into slots,That along with basic knowledge of the system and you should have a tic-tac-toe game in no time.
If you need help with something more in depth,you should be more specific.