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  User Interface Components
  For Web applications, PM.Net framework uses MVC architecture and PowerMigrator.Net front-end tool will generate ASP.Net UI components automatically extracting it from the original PowerBuilder application. This increases reusability, maintainability, and extensibility. This also helps to encapsulate dependencies between forms and the logic associated with navigating between them.
   
  User Interface Process Components
  Complex user interfaces often require many highly complex forms. To increase reusability, maintainability, and extensibility, you can create a separate user interface process (UIP) component to encapsulate dependencies between forms and the logic associated with navigating between them. You can apply the same concept to the dependencies, validation, and navigation between components of a single form. These UIP components are typically custom components that are based on design patterns.

The interaction between UI and UIP components often follows the Model-View-Controller or Presentation-Abstraction-Controller.
   
  Business:
  The business layer implements the business functionality of the application. The domain layer is typically composed of a number of components implemented using PowerMigrator tool, process and methodology to convert PowerBuilder NVO's to equivalent VB.Net components, which will be augmented with PM.Net framework. This will be deployed on the core Microsoft?.NET platform for scalable distributed component solutions and optionally with Microsoft BizTalk?Server for workflow orchestration.
   
  Data:
 

The data layer provides access to external systems such as databases. The primary .NET technology involved at this layer is ADO.NET.
1. In memory structure is nothing but the datawindow buffer and related logic has been migrated to data set which is an integral part of ADO.Net
2. Data access logic, data update logic like insert, update and delete logic is an integral part of the datawindow. This logic will be extracted and implemented in .NET using Data Adapter, which is again an integral part of ADO.Net.
3. Conventional PowerBuilder application use to connect to the database using typically either using Native or ODBC driver, which will be migrated to data connection object in ADO.Net.We will also take care to use .Net XML as a part of our migration, which will enable the migrated VB.Net component to server as Web service component
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