Use the HtmlTable.Width property to control the width of the System.Web.UI.HtmlControls.HtmlTable control. The width is normally specified in pixels. However, you can also specify a percentage of the browser window width by appending a percent sign (%) to the value. For example, the value 100% indicates a width for the table that is the full width of the browser window. The table automatically expands and contracts as the user changes the window size.