The GUI portions of the PB™ application will be migrated into WinForm. The global function objects, business objects (NVO) will be migrated as middle tier business objects. The GUI portion of datawindow objects will be moved in to WinForm and the data access logic portion of datawindow objects will be moved as business objects using ADO.NET™

Where as the database is used with out any changes, unless it is required for migration from one database into another database or moving the business logic from the database such as stored procedure which, need not be a part of data layer into middle tier component or due to the changes in the functionality of the application as part of the migration.