Index: ApplicationComponentContainer.cs
===================================================================
--- ApplicationComponentContainer.cs	(revision 9580)
+++ ApplicationComponentContainer.cs	(working copy)
@@ -31,6 +31,8 @@
 
 using System.Collections.Generic;
 using ClearCanvas.Desktop.Validation;
+using ClearCanvas.Common;
+using System;
 
 namespace ClearCanvas.Desktop
 {
@@ -39,6 +41,81 @@
     /// </summary>
     public abstract class ApplicationComponentContainer : ApplicationComponent, IApplicationComponentContainer
     {
+        /// <summary>
+        /// Defines an application component host appropriate for the components the 
+        /// <see cref="ApplicationComponentContainer"/> will contain.  The host overrides delegate to
+        /// the host of the parent container.
+        /// </summary>
+        public class SubHost : ApplicationComponentHost
+        {
+            private ApplicationComponentContainer _owner;
+
+            /// <summary>
+            /// Contruct the contained sub host with the <see cref="ApplicationComponentContainer"/>
+            /// owner that will provide access to the real host.  The contained component is passed
+            /// to the base <see cref="ApplicationComponentHost"/>.
+            /// </summary>
+            /// <param name="owner"></param>
+            /// <param name="component"></param>
+            public SubHost(
+                ApplicationComponentContainer owner,
+                IApplicationComponent component)
+                : base(component)
+            {
+                Platform.CheckForNullReference(owner, "owner");
+
+                _owner = owner;
+            }
+
+            #region ApplicationComponentHost overrides
+
+            /// <summary>
+            /// Gets the associated desktop window.
+            /// </summary>
+            public override DesktopWindow DesktopWindow
+            {
+                get { return OwnerHost.DesktopWindow; }
+            }
+
+            /// <summary>
+            /// Gets the title displayed in the user-interface.
+            /// </summary>
+            /// <remarks>
+            /// The title generally cannot be set.  This behavior is inherited from the 
+            /// base.
+            /// </remarks>
+            /// <exception cref="NotSupportedException">The host does not support titles.</exception>
+            public override string Title
+            {
+                get { return OwnerHost.Title; }
+                // individual components cannot set the title for the container
+                set { throw new NotSupportedException(); }
+            }
+
+            /// <summary>
+            /// Contained components will use the comand history provided by the host that 
+            /// owns the container.
+            /// </summary>
+            public override CommandHistory CommandHistory
+            {
+                get
+                {
+                    return OwnerHost.CommandHistory;
+                }
+            }
+
+            #endregion
+
+            /// <summary>
+            /// Provide access to the owning host in case subclasses need to override host behavior not 
+            /// already handled by this class.
+            /// </summary>
+            protected IApplicationComponentHost OwnerHost
+            {
+                get { return _owner.Host; }
+            }
+        }
+
         private IApplicationComponentContainerValidationStrategy _validationStrategy;
 
         /// <summary>
Index: ChildComponentHost.cs
===================================================================
--- ChildComponentHost.cs	(revision 9580)
+++ ChildComponentHost.cs	(working copy)
@@ -69,5 +69,16 @@
             get { return _parentHost.Title; }
         }
 
+        /// <summary>
+        /// Gets the parent's command history
+        /// </summary>
+        public override CommandHistory CommandHistory
+        {
+            get
+            {
+                return _parentHost.CommandHistory;
+            }
+        }
+
     }
 }
Index: PagedComponentContainer.cs
===================================================================
--- PagedComponentContainer.cs	(revision 9580)
+++ PagedComponentContainer.cs	(working copy)
@@ -85,41 +85,14 @@
     {
         /// <summary>
         /// Defines an application component host for one page.
-        /// </summary>
-        private class PageHost : ApplicationComponentHost
+        /// </summary>        
+        private class PageHost : ApplicationComponentContainer.SubHost
         {
-            private readonly PagedComponentContainer<TPage> _container;
-
             internal PageHost(PagedComponentContainer<TPage> container, ContainerPage page)
-                : base(page.Component)
+                : base(container, page.Component)
             {
-                _container = container;
-            }
 
-            #region ApplicationComponentHost overrides
-
-			/// <summary>
-			/// Gets the <see cref="DesktopWindow"/> that owns the <see cref="PagedComponentContainer{TPage}"/>.
-			/// </summary>
-            public override DesktopWindow DesktopWindow
-            {
-                get { return _container.Host.DesktopWindow; }
             }
-
-			/// <summary>
-			/// Gets the title of the <see cref="PagedComponentContainer{TPage}"/>.
-			/// </summary>
-			/// <remarks>
-			/// The set method is unsupported and will throw an exception.
-			/// </remarks>
-            public override string Title
-            {
-                get { return _container.Host.Title; }
-                // individual components cannot set the title for the container
-                set { throw new NotSupportedException(); }
-            }
-            
-            #endregion
         }
 
         private class PageList : ObservableList<TPage>
Index: SimpleComponentContainer.cs
===================================================================
--- SimpleComponentContainer.cs	(revision 9580)
+++ SimpleComponentContainer.cs	(working copy)
@@ -49,39 +49,25 @@
     [AssociateView(typeof(SimpleComponentContainerViewExtensionPoint))]
     public class SimpleComponentContainer : ApplicationComponentContainer
     {
-		private class ContainedComponentHost : ApplicationComponentHost
+        private class ContainedComponentHost : ApplicationComponentContainer.SubHost
         {
-            private SimpleComponentContainer _owner;
-
-			internal ContainedComponentHost(
-				SimpleComponentContainer owner,
-				IApplicationComponent component)
-				: base(component)
+            internal ContainedComponentHost(
+                SimpleComponentContainer owner,
+                IApplicationComponent component)
+                : base(owner, component)
             {
-				Platform.CheckForNullReference(owner, "owner");
-                _owner = owner;
             }
 
             #region ApplicationComponentHost overrides
 
-			/// <summary>
-			/// Gets the associated desktop window.
-			/// </summary>
-			public override DesktopWindow DesktopWindow
+            /// <summary>
+            /// Gets or sets the title displayed in the user-interface.
+            /// </summary>
+            public override string Title
             {
-				get { return _owner.Host.DesktopWindow; }
+                set { OwnerHost.Title = value; }
             }
 
-			/// <summary>
-			/// Gets or sets the title displayed in the user-interface.
-			/// </summary>
-			/// <exception cref="NotSupportedException">The host does not support titles.</exception>
-			public override string Title
-            {
-				get { return _owner.Host.Title; }
-				set { _owner.Host.Title = value; }
-            }
-
             #endregion
         }
 
Index: SplitComponentContainer.cs
===================================================================
--- SplitComponentContainer.cs	(revision 9580)
+++ SplitComponentContainer.cs	(working copy)
@@ -68,49 +68,17 @@
     {
 		/// <summary>
 		/// A host for a <see cref="SplitPane"/>.
-		/// </summary>
-        private class SplitPaneHost : ApplicationComponentHost
+		/// </summary>        
+        private class SplitPaneHost : ApplicationComponentContainer.SubHost
         {
-            private SplitComponentContainer _owner;
-
-            internal SplitPaneHost(
-				SplitComponentContainer owner,
-				SplitPane pane)
-                :base(pane.Component)
+            internal SplitPaneHost(SplitComponentContainer owner,
+                SplitPane pane)
+                : base(owner, pane.Component)
             {
-				Platform.CheckForNullReference(owner, "owner");
 
-                _owner = owner;
             }
-
-            #region ApplicationComponentHost overrides
-
-			/// <summary>
-			/// Gets the associated desktop window.
-			/// </summary>
-			public override DesktopWindow DesktopWindow
-            {
-                get { return _owner.Host.DesktopWindow; }
-            }
-
-			/// <summary>
-			/// Gets the title displayed in the user-interface.
-			/// </summary>
-			/// <remarks>
-			/// The title cannot be set.
-			/// </remarks>
-			/// <exception cref="NotSupportedException">The host does not support titles.</exception>
-			public override string Title
-            {
-                get { return _owner.Host.Title; }
-                // individual components cannot set the title for the container
-                set { throw new NotSupportedException(); }
-            }
-            
-            #endregion
         }
 
-
 		private SplitPane _pane1;
 		private SplitPane _pane2;
 		private SplitOrientation _splitOrientation;
Index: TabGroupComponentContainer.cs
===================================================================
--- TabGroupComponentContainer.cs	(revision 9580)
+++ TabGroupComponentContainer.cs	(working copy)
@@ -69,43 +69,13 @@
 		/// <summary>
 		/// A host for <see cref="TabGroup"/>s.
 		/// </summary>
-        private class TabGroupHost : ApplicationComponentHost
+        private class TabGroupHost : ApplicationComponentContainer.SubHost
         {
-            private TabGroupComponentContainer _owner;
-
-            /// <summary>
-            /// Constructor.
-            /// </summary>
-            /// <param name="owner">The container that owns this host.</param>
-            /// <param name="tabGroup">The <see cref="TabGroup"/> that is hosted by this object.</param>
-			internal TabGroupHost(TabGroupComponentContainer owner, TabGroup tabGroup)
-                : base(tabGroup.Component)
+            internal TabGroupHost(
+                TabGroupComponentContainer owner, TabGroup tabGroup)
+                : base(owner, tabGroup.Component)
             {
-                Platform.CheckForNullReference(owner, "owner");
-                _owner = owner;
             }
-
-			#region ApplicationComponentHost overrides
-
-			/// <summary>
-			/// Gets the title of the parent container.
-			/// </summary>
-            public override string Title
-            {
-                get { return _owner.Host.Title; }
-                // individual components cannot set the title for the container
-                set { throw new NotSupportedException(); }
-            }
-
-			/// <summary>
-			/// Gets the <see cref="IDesktopWindow"/> that owns the parent container.
-			/// </summary>
-            public override DesktopWindow DesktopWindow
-            {
-                get { return _owner.Host.DesktopWindow; }
-            }
-
-            #endregion
         }
 
         private List<TabGroup> _tabGroups;