diff --git a/CSharp/Libraries/UniversalEditor.UserInterface/IHostApplicationWindow.cs b/CSharp/Libraries/UniversalEditor.UserInterface/IHostApplicationWindow.cs
index e7706057..e63426a9 100644
--- a/CSharp/Libraries/UniversalEditor.UserInterface/IHostApplicationWindow.cs
+++ b/CSharp/Libraries/UniversalEditor.UserInterface/IHostApplicationWindow.cs
@@ -56,6 +56,8 @@ namespace UniversalEditor.UserInterface
 		void UpdateProgress(int minimum, int maximium, int value);
 
 		void ActivateWindow();
+
+		void ShowStartPage();
 	}
 	public class IHostApplicationWindowCollection
 		: System.Collections.ObjectModel.Collection<IHostApplicationWindow>