public void KeyDown(System.Object Sender, System.Windows.Forms.KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Q:
Label1.BackColor = Color.Green;
dteStart = DateAndTime.Now();
break;
case Keys.W:
Label2.BackColor = Color.Green;
break;
case Keys.E:
Label3.BackColor = Color.Green;
break;
case Keys.R:
Label4.BackColor = Color.Green;
dteFinish = DateAndTime.Now();
span = dteFinish.Subtract(dteStart);
Label5.Text = span.ToString();
break;
}
}