The webview object is a standard Microsoft web component. It enables you to show basic HTML/CSS webpages inside your game launcher.
Use the full, absolute URL to the web page you want to show in here.
Notes about WebView
The webview object is a Microsoft object inside every version of Windows. It is based upon the old Internet Explorer web component library, later modified by Microsoft.
You can always purchase the WebKit+ object if you wish to have more web capabilities inside your game launcher.