Private Sub GMapControl1_OnMarkerClick(item As GMapMarker, e As MouseEventArgs) Handles GMapControl1.OnMarkerClick
       Dim pt as PointLatLng = GMapControl1.FromLocalToLatLng(e.X, e.Y)
       MessageBox.Show(String.Format("Latitude: {0}, Longitude: {1}",pt.Lat, pt.Lng))
End Sub