Highlighting point using ArcGIS API for JavaScript?

Question

How can I highlight a point using ArcGIS API for JavaScript?

When I use the function of centerAndZoom, I also want to highlight this point.

Answer 1

 queryTask.execute(query, function (results) {
 var selectionSymbol = new PictureMarkerSymbol('http://www.clipartandgraphics.com/images/borders/coloroval.gif', 50, 50);
 var graphic = new Graphic(results[0].geometry, selectionSymbol, 50, 50);
 map.graphics.add(graphic);
 map.centerAndZoom(results[0].geometry, 15);
 });