Thanks for your reply. Here's what the Bing Analytics guide says - but I can't find anyway to do this on my ecwid site - to get to header or body sections. There is a place to add the google analytics code, but that's all.
"Below is the Bing Ads UET tag tracking code. You need to add it to your entire website in the header or body sections. If your website has a master page, then you can add it once there and it is included in all pages.
For tips see
http://help.bingads.microsoft.com/#apex/3/en/56688/-1
<script>(function(w,d,t,r,u){var f,n,i;w[u]=w[u]||[],f=function(){var o={ti:"49000224"};o.q=w[u],w[u]=new UET(o),w[u].push("pageLoad")},n=d.createElement(t),n.src=r,n. async=1,n.onload=n.onreadystatechange=function(){v ar s=this.readyState;s&&s!=="loaded"&&s!=="complete"| |(f(),n.onload=n.onreadystatechange=null)},i=d.get ElementsByTagName(t)[0],i.parentNode.insertBefore(n,i)})(window,document, "script","//bat.bing.com/bat.js","uetq");</script>
I can't find anyway to get to any pages so I can enter the code in the header or body sections.