Here's the Visual Studio project for the SuDoKu detection tutorial at
AI Shack. If you're not using Visual Studio, use the code and create a
new project if your IDE. Make sure you link to the OpenCV libraries.

Do whatever you want with the code :P

Here's the tutorial that this code came with:
http://www.aishack.in/2010/08/sudoku-grabber-with-opencv