Microsoft providers two Workflow development tool for Windows SharePoint Services. First one is Visual Studio 2005 Extension Second one is Office SharePoint Designer 2007 Visual Studio 2005 Office SharePoint Designer 2007 Visual Studio 2005 Designer for Windows Workflow Foundation Office SharePoint Designer 2007 Can write workflows for Microsoft Windows SharePoint Services 3.0 Can write workflows for Microsoft Windows SharePoint Services 3.0 Code-behind file enables developer to write custom Microsoft ......