this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);

private int GetIndex(Keys key)
{
    switch (key)
    {
            case Keys.D1:
                return 0;
            case Keys.D2:
                return 1;
            case Keys.D3:
                return 2;
            case Keys.D4:
                return 3;
            case Keys.D5:
                return 4;
            case Keys.D6:
                return 5;
            case Keys.D7:
                return 6;
            case Keys.D8:
                return 7;
            default:
                return -1;
    }
}

private void Form1_KeyDown(object sender, KeyEventArgs e)
    {
        Keys key = e.KeyCode;
        Console.WriteLine(key + "");
        if (e.Alt)
        {
            int row = GetIndex(key);
            if (row != -1)
            {
                RevertRow(row);
                Invalidate();
            }
        }
        e.Handled = true;
    }