private void myKeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if (e.KeyCode==Keys.W || e.KeyCode == Keys.NumPad8) 
{
((Button)sender).Top -=  10 ;
}
if (e.KeyCode==Keys.S || e.KeyCode == Keys.NumPad2) 
 {
((Button)sender).Top +=  10 ;
 }
}

private void Form1_Load(object sender, System.EventArgs e)
{
foreach (Control c in this.Controls) 
{
c.KeyDown += new System.Windows.Forms.KeyEventHandler(this.myKeyDown);
}
}

if (sender is Button)
{
((Button)sender).Top -=  10 ;
}

e.KeyCode == Keys.NumPad8

static void Main() 
{
	Form1 F = new Form1();
	foreach (Control c in F.Controls) 
{
c.KeyDown += new System.Windows.Forms.KeyEventHandler(F.myKeyDown);
}
	Application.Run(F);
}