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Specifying the Project Structure 
First define the following project structure for the sample form:
...
1. Web Dynpro project:
Name: WebDynpro_ErrorBehavior
2. Web Dynpro component:
Name: SimpleErrors
Package: com.sap.tc.webdynpro.tutorial.errorbehavior
3. Two Web Dynpro views:
4. Views in the Web Dynpro component SimpleErrors:Form and EMailEditor
Lifespan property (to be set under the Properties tab)
¡ View Form: framework_controled
¡ View EMailEditor: when_visible
¡

For more information on the importance of the lifespan property of a view controller, refer to the section Implementing the EMailEditor View Controller.
Include both view in the window SimpleErrors.
Declare the view Form in the window SimpleErrors as the default view..
5. Web Dynpro application:
Name: ErrorBehaviorApp
Package: com.sap.tc.webdynpro.tutorial.errorbehavior
Web-Dynpro component: SimpleErrors
Interface view: SimpleErrorsInterfaceView
Startup plug: Default
Now
start developing the view
declaratively.