Application keys identify the specific repository and optionally an application environment service for this session's data to be associated with. The server administrator can determine by application key whether to accept the session data or not.
Requirements
Target Platforms: 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