who to locate a pushpin with a rigth button

Hello

I have this code:

Public Sub MouseUpEvent(ByVal sender As Object, ByVal e As AxMapPoint._IMappointCtrlEvents_MouseUpEvent) Handles mapa.MouseUpEvent

If lastmousebuttonrigth Then
popupMenu.Show(mapa, New Point(e.x, e.y))

End If
lastmousebuttonrigth = False
End Sub
who i can to kno that the rigth click is over a punsh pin