private void CheckHighlighting(int index) { if (game.RowValid(game.GetRowByIndex(index))) { for (var i = 0; i < game.gridWidth; i++) { Control current = sudokuPanel.Controls.Find("sudoku_" + i + "_" + game.GetRowByIndex(index), true)[0]; current.ForeColor = Color.Green; // Work in progress //current.Enabled = false; } hintOutput.Text = "row valid"; } if (game.ColumnValid(game.GetColumnByIndex(index))) { for (var i = 0; i < game.gridHeight; i++) { Control current = sudokuPanel.Controls.Find("sudoku_" + game.GetColumnByIndex(index) + "_" + i, true)[0]; current.ForeColor = Color.Green; //current.Enabled = false; } hintOutput.Text = "column valid"; } if (game.SquareValid(game.GetSquareFromIndex(index))) { int square = game.GetSquareFromIndex(index); for (var i = 0; i < game.numberOfSquares; i++) { Control current = sudokuPanel.Controls.Find("sudoku_" + game.GetColumnByIndex(game.GetBySquare(square, i)) + "_" + game.GetRowByIndex(game.GetBySquare(square, i)), true)[0]; current.ForeColor = Color.Green; //current.Enabled = false; } hintOutput.Text = "square valid"; } }