This is not possible .. the style is set at creation time and cannot be changed (attempting to do so has no effect).
But you can cheat
Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers. The PreTranslateMessage function is to be used to intercept and respond to keyboard events.
Continuing from the fourth article about sudoku. …
Exception Handling is in the core of any application that is able to dignify its name.
In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.