public partial class SudokuControl : UserControl
    {
        public int nSizeSubBoard;
        public int nSizeBoard;
        public bool IsInEditMode;
        private GameBoardCell[,] GameBoard;
        public SudokuControl()
        {
            nSizeSubBoard = 3; nSizeBoard = 9;
            GameBoard = new GameBoardCell[nSizeBoard, nSizeBoard];
            IsInEditMode = true;
            InitializeComponent();
            InitializeGrid();
        }
        private void InitializeGrid()
        {
            for (int nZeile = 0; nZeile < nSizeBoard; nZeile++)
                for (int nSpalte = 0; nSpalte < nSizeBoard; nSpalte++)
                {
                    GameBoardCell newBox = new GameBoardCell(this);                  
                    newBox.Width = this.Width / nSizeBoard;
                    newBox.Height = this.Height / nSizeBoard;
                    newBox.Location = new System.Drawing.Point((this.Width / nSizeBoard) * nSpalte, (this.Height / nSizeBoard) * nZeile);
                    this.Controls.Add(newBox);
                    GameBoard[nZeile, nSpalte] = newBox;
                }
        }
    }