Passing System.EventArgs as parameters

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Hi everyone,

I've been using VB.NET for about 6 weeks now and I keep stumbling on a
concept that I hope someone can clear up for me. Each event of a
control has 2 parameters, sender and e....I am not understanding what
the purpose of those parameters are. Can someone clear that up?

Along those lines, I also don't understand how to make a call to a
Click event...what are you supposed to pass in?

In a program that I am working on I need to draw a border around a
panel. I did some research and found some code that will do just that
(sorry if it pastes ugly):

Private Sub PaintBorder(ByVal sender As Object, ByVal e As
System.Windows.Forms.PaintEventArgs)
ControlPaint.DrawBorder(e.Graphics, e.ClipRectangle,
Color.Black, 3, ButtonBorderStyle.Solid, Color.Black, 3,
ButtonBorderStyle.Solid, Color.Black, 3, ButtonBorderStyle.Solid,
Color.Black, 3, ButtonBorderStyle.Solid)
End Sub

How would I call this function if I wanted to paint a border on a panel
called Panel1???

Thank you in advance for any help!

.

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