http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/03/05/Extending-tiled-layers-in-the-ArcGIS-API-for-Flex.aspxThe ArcGIS API for Flex supports access to layer types not included with the API. Depending on what you are trying to connect to (or do), you might want to extend TiledMapServiceLayer , DynamicMapServiceLayer or Layer . Extend DynamicMapServiceLayer ifenCommunityServer 2.1 SP2 (Debug Build: 61120.2)http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/03/05/Extending-tiled-layers-in-the-ArcGIS-API-for-Flex.aspx#3981Fri, 06 Mar 2009 11:10:37 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:3981Matt BGreat post. Could you show us how to implement this to use WMS? I think a lot of people would find this useful. Thanks Matthttp://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/03/05/Extending-tiled-layers-in-the-ArcGIS-API-for-Flex.aspx#4034Mon, 09 Mar 2009 21:12:37 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:4034BrianBrilliant, thanks!http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/03/05/Extending-tiled-layers-in-the-ArcGIS-API-for-Flex.aspx#4105Sun, 15 Mar 2009 14:26:58 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:4105shenyuit is very cool. Could you show us how to implement this to use OpenLayer?http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/03/05/Extending-tiled-layers-in-the-ArcGIS-API-for-Flex.aspx#4194Fri, 20 Mar 2009 00:51:17 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:4194GeorgeCould you give any guidance on how to set it up to read the conf.xml file so that you wouldn't have to set the parameters for the layer? Thanks, Georgehttp://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/03/05/Extending-tiled-layers-in-the-ArcGIS-API-for-Flex.aspx#6108Wed, 27 May 2009 22:43:57 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:6108Bjorn SvenssonMatt et al, at the Developer Summit we showed how to extend DynamicMapServiceLayer to access WMS services. The code from that presentation is available in the Code Gallery: http://resources.esri.com/arcgisserver/apis/flex/index.cfm?fa=codeGalleryDetails&scriptID=16176