This example runs when a mouse button is pressed while the pointer is over a chart.
Private Sub Chart_MouseDown(ByVal Button As Long, _
ByVal Shift As Long, ByVal X As Long, ByVal Y As Long)
MsgBox "Button = " & Button & chr$(13) & _
"Shift = " & Shift & chr$(13) & _
"X = " & X & " Y = " & Y
End Sub