Need help for adresses using bing maps and Javascript

Question

Hi, 

I am developping an application where User need to put an adress in a field and it has to show it on the bing map ...I made a fonction that locate and show the user location 

function centerPosition() {
        var geolocator = new Windows.Devices.Geolocation.Geolocator();
        geolocator.getGeopositionAsync().then(function (loc) {
            var mapCenter = map.getCenter();
            /*   mapCenter.latitude = 45.5000;
               mapCenter.longitude = -73.5833;
               mapCenter.altitude = 173;*/
            mapCenter.latitude = loc.coordinate.latitude;
            mapCenter.longitude = loc.coordinate.longitude;
            //  45°31′00″ de latitude nord et à 73°39′00″
            map.setView({ center: mapCenter, zoom: 15 });

            addPushPin(mapCenter);
        });
    }
    

But can someone explain and help me in how to add another point on the bing map where user will define a location