The Code Project - Free Source Code and Tutorials I first heard about Marc Clifton on his work with MyXaml, a declarative UI language that shares a name and some principles with the XAML declarative language in Longhorn, but that works on .NET now. Until today, I had missed his earlier work on this subject: The Application Automation Layer: Introduction And Design, along with the rest of his 51 articles on CodeProject.com (wow).