• Dsl contains the Domain model definition (DslDefinition.dsl) and the generated code for the model
• UI contains the Winforms control (named ModelViewControl) that represents the model using Data binding.
• DslPackage is a Visual Studio package integrating the domain model and its representation (the model view) with Visual Studio

When you change the model in the Definition.dsl file, you'll need to:

1.  "Transform All Templates" and rebuild the Dsl project.
2. Then, you'll have to update the ModelViewControl in the UI project to represent changes in the Model and update the data binding.
3. Finally, build the DsPackage project