How do I add a shapefile (.lpk) to a map?

Discussion created by sucinimad on Nov 22, 2013
Latest reply on Nov 25, 2013 by jeff.pace
I'm not familiar with GIS so I don't know what kind of layer a shapefile is. How do I add it to an existing map?

My map:
map = new esri.Map("mapDiv", {
    center: [-95.80, 39.29],
    zoom: 4,
    basemap: "topo"

Thank you.