how to get points return from OpenLayers.Control.DrawFeature

Question

Answer 1

You can just add an event handler for the 'featureadded' event on each DrawFeature control, and then write out the feature's geometry using OpenLayers.Format.WKT, like this:

for(var key in drawControls) {
  map.addControl(drawControls[key]);

  // register a listener on each control
  drawControls[key].events.register('featureadded', drawControls[key], function(f) {

    // create a WKT reader/parser/writer          
    var wkt = new OpenLayers.Format.WKT();

     // write out the feature's geometry in WKT format
     var out = wkt.write(f.feature);
     console.log(out);
   });
}

Example Output:
POLYGON((17.71874986589 9.6328123658895,20.53124986589 -10.05468763411,37.93359361589 9.2812498658895,17.71874986589 9.6328123658895))