This file contains instructions on the current steps to generate asp_html.xsd. Step 1: Create a new web application Step 2: Debug the web application, using mgd debugging Step 3: Set a breakpoint in mvw\webcontrolschemagenerator\schemainfo.cs SchemaInfo::Populate on the line: if (_schemaInfoCreationData.RequireToolBoxItemAttribute) Step 4: Add the following register directive to the page <%@ Register TagPrefix="foo" namespace="System.Web.UI.HtmlControls" Assembly="System.Web" %> Step 5: When the breakpoint hits, set _schemaInfoCreationData.RequireToolBoxItemAttribute to false when attempting to generate the schema for the newly inserted register directive. Step 6: The new schema should now be in C:\Documents and Settings\%USERNAME%\Application Data\Microsoft\VisualStudio\8.0\ReflectedSchemas