When the chart is being deployed as an Image, if the Type of Unit assigned to this property is anything other than Pixels, the setting will be ignored and the last valid Width in Pixels will be used. When Flash or SVG rendering is enabled, Percentage values are also accepted for this property.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2