Button Collection for Toolbar WebControl - Determinine which button was clicked

I am using the following code to trap the onclick event for the Toolbar
Webcontrol. The problem is that I have no way to tell which button on the
toolbar was clicked.

Any ideas?

Thanks in advance.

Private Sub Toolbar1_ButtonClick(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Toolbar1.ButtonClick

TextBox1.Text = "Clicked"

'TextBox1.Text = sender.GetType.ToString

'TextBox1.Text = e.ToolTip.ToString

'textbox1.Text = sender..gettype.IndexOf(e.Button))



End Sub