Bing Maps v8 API - Adding event handlers to HTML Pushpin Overlay

Question

Building on the HTML Pushpin Overlay (https://msdn.microsoft.com/en-us/library/mt762877.aspx), we have some custom HTML pushpins that we need to add event handlers to. What needs to be added to the HtmlPushpin Class for it to function as a regular pushpin?

Microsoft.Events.addHandler(htmlPushpin, 'click', function(e){
});