This value should be a relative path following HTML and IETF standards for a relative Uniform Resource Locator (URL). You may specify "~/" in the beginning of the URL, to specify that the image should be based off of your Application root. The URL specified here will use an ImageDirectory specified in your "web.config" file, if present.
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