This page is inside a Resource file. The file is loaded by using res:// protocol. This protocol is used by Internet Explorer when showing error messages. These error messages are loaded from SHDocVw.dll or SHDoc401.dll if you have Internet Explorer™ 5.0 or later. Since this resource format is supported only by Internet Explorer, you can use DHTML or IE specific scripting. A fine example of using HTML Interface is the KeyTools, which is a HTML help tool.
When you Right-Click this browser window, you will find that the default popup you see has been replaced by the About ... menu. Click this menu and see what happens ...
As a matter of fact, let's try some DHTML too. Click the button below and the background will change to a file compiled with the resource. You can click the button again to change to this plain background.