GMap1.addControl(new GControl(GControl.preBuilt.GOverviewMapControl));
GMap1.addControl(new GControl(GControl.preBuilt.LargeMapControl));
GMarker marker = new GMarker(new GLatLng(39.5, -3.2));
GInfoWindow window = new GInfoWindow(marker, "<center><b>GoogleMaps.Subgurim.NET</b></center>", true);
GMap1.addInfoWindow(window);