protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
            switch(keyData){
                case Keys.Up:
                    if (manY != 0){
                        if (map[manX, manY - 1] != 0) {
                            manY--;
                            this.Refresh();
                        }
                    }
                    break;
                case Keys.Left:
                    if (manX != 0) {
                        if (map[manX - 1, manY] != 0) {
                            manX--;
                            this.Refresh();
                        }
                    }
                    break;
                case Keys.Down:
                    if (manY != 7) {
                        if (map[manX , manY + 1] != 0) {
                            manY++;
                            this.Refresh();
                        }
                    }
                    break;
                case Keys.Right:
                    if (manX != 7) {
                       if (map[manX + 1, manY] != 0) {
                            manX++;
                            this.Refresh();
                       }
                    }
                    break;
            }
            return base.ProcessCmdKey(ref msg, keyData);
        }