ListBox control

Question

I would like to chang the values of list by the up and down arrow keys of keyboard,

how to make it. nowi am using some lines under 'keydown' event of list box

listBox1.Focus();

listBox1.Select();

listBox1.Visible = true;

if (e.KeyCode == Keys.Up)

{

this.listBox1.SelectedIndex--;

}

else if (e.KeyCode == Keys.Down)

{

this.listBox1.SelectedIndex++;

}

}