This property determines or reflects the virtual browser width
when rendering HTML.
HTML documents do not have a predefined width and height. The
width of an HTML document varies as the client resizes the browser.
How far the content flows down the page is dependent on the width
of the browser.
The Width parameter is used to control this aspect of HTML
rendering. It is exactly as if you were displaying your HTML in a
browser window the same width as the supplied value. Typical values
might be 640 or 800.
If the Width is zero, then the web page view will default to a
size which shows all the available content without needing to
scroll from left to right. You can use this default to ensure that
all your HTML content is visible.