PowerDesigner provides support for Windows applications through an extended model definition.
Verify that the current model has the target language C# 2.0 or Visual Basic 2005, and includes an extended model definition for either ADO.NET or Nhibernate.
Select Model > Extended Model Definitions, and click the Import tool.
Click the User Interface sub-tab, select the Windows Applicationxem, and click OK to attach it to your model.
Click OK to close the List of Extended Model Definitions and return to your model.
Note:
You can also attach an XEM at model creation time by clicking the Select Extensions button on the New Model dialog.