myHandlervf.page

<apex:page showHeader="false" sidebar="false">
    <apex:includeLightning />
	<div id="lightning"> Hello world VF ..!!! </div>
	<script>

		$Lightning.use("c:myEventApp", function() {
		    $Lightning.createComponent("c:myComponent", {}, "lightning", function(){
		        $A.eventService.addHandler({ "event": "c:myEvent", "handler" : visualForceFunction});

		    });
		}); 

	</script>

	<script>

	var visualForceFunction = function(event){
		    var myEventData = event.getParam("data");
		    console.log(myEventData);
		};
		
	</script>
</apex:page>