ChildWindow: added FocusedElement property that will allow you to set the initial focused element when the ChildWindow is shown/receives focus.

FocusedElement="{Binding ElementName=_textBox}"

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ChildWindow/Implementation/ChildWindow.cs

@@ -6,11 +6,10 @@ using System.Windows.Media;
 using System.Windows.Controls.Primitives;
 using System.ComponentModel;
 using System.Windows.Shapes;
+using System.Windows.Threading;
 
 namespace Microsoft.Windows.Controls
 {
-    [TemplateVisualState(GroupName = VisualStates.WindowStatesGroup, Name = VisualStates.Open)]
-    [TemplateVisualState(GroupName = VisualStates.WindowStatesGroup, Name = VisualStates.Closed)]
     public class ChildWindow : ContentControl
     {
         #region Private Members
@@ -42,6 +41,8 @@ namespace Microsoft.Windows.Controls
 
         public ChildWindow()
         {
+            IsVisibleChanged += ChildWindow_IsVisibleChanged;
+
             _modalLayer.Fill = OverlayBrush;
             _modalLayer.Opacity = OverlayOpacity;
         }
@@ -98,8 +99,17 @@ namespace Microsoft.Windows.Controls
             }
 
             _root.Children.Add(_modalLayerPanel);
+        }
 
-            ChangeVisualState();
+        protected override void OnGotFocus(RoutedEventArgs e)
+        {
+            Action action = () =>
+            {
+                if (FocusedElement != null)
+                    FocusedElement.Focus();
+            };
+
+            Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, action);
         }
 
         protected override void OnKeyDown(KeyEventArgs e)
@@ -219,6 +229,17 @@ namespace Microsoft.Windows.Controls
 
         #endregion //DialogResult
 
+        #region FocusedElement
+
+        public static readonly DependencyProperty FocusedElementProperty = DependencyProperty.Register("FocusedElement", typeof(FrameworkElement), typeof(ChildWindow), new UIPropertyMetadata(null));
+        public FrameworkElement FocusedElement
+        {
+            get { return (FrameworkElement)GetValue(FocusedElementProperty); }
+            set { SetValue(FocusedElementProperty, value); }
+        } 
+
+        #endregion
+
         #region IsModal
 
         public static readonly DependencyProperty IsModalProperty = DependencyProperty.Register("IsModal", typeof(bool), typeof(ChildWindow), new UIPropertyMetadata(false, new PropertyChangedCallback(OnIsModalPropertyChanged)));
@@ -431,6 +452,12 @@ namespace Microsoft.Windows.Controls
 
         #region Event Handlers
 
+        void ChildWindow_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
+        {
+            if ((bool)e.NewValue)
+                Focus();
+        }
+
         void HeaderLeftMouseButtonDown(object sender, MouseButtonEventArgs e)
         {
             e.Handled = true;
@@ -548,8 +575,6 @@ namespace Microsoft.Windows.Controls
                         break;
                     }
             }
-
-            ChangeVisualState(); //perform the close
         }
 
         private void ExecuteClose()
@@ -600,8 +625,6 @@ namespace Microsoft.Windows.Controls
 
             if (IsModal)
                 Canvas.SetZIndex(_modalLayerPanel, index - 2);
-
-            Focus();
         }
 
         private void CenterChildWindow()
@@ -637,22 +660,6 @@ namespace Microsoft.Windows.Controls
 
         #endregion //Private
 
-        #region Protected
-
-        protected virtual void ChangeVisualState()
-        {
-            if (WindowState == WindowState.Closed)
-            {
-                VisualStateManager.GoToState(this, VisualStates.Closed, true);
-            }
-            else
-            {
-                VisualStateManager.GoToState(this, VisualStates.Open, true);
-            }
-        }
-
-        #endregion //Protected
-
         #region Public
 
         public void Show()

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ChildWindow/Implementation/VisualStates.ChildWindow.cs

@@ -1,22 +0,0 @@
-using System;
-
-namespace Microsoft.Windows.Controls
-{
-    internal static partial class VisualStates
-    {
-        /// <summary>
-        /// Window State group name.
-        /// </summary>
-        public const string WindowStatesGroup = "WindowStatesGroup";
-
-        /// <summary>
-        /// Open state name for ChildWindow.
-        /// </summary>
-        public const string Open = "Open";
-
-        /// <summary>
-        /// Closed state name for ChildWindow.
-        /// </summary>
-        public const string Closed = "Closed";
-    }
-}

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ChildWindow/Themes/Generic.xaml

@@ -136,34 +136,6 @@
                             </Style>
                         </Grid.Resources>
 
-                        <!--VisualStateManager-->
-                        <VisualStateManager.VisualStateGroups>
-                            <VisualStateGroup x:Name="WindowStatesGroup">
-                                <VisualState x:Name="Closed">
-                                    <Storyboard>
-                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Root" Storyboard.TargetProperty="Visibility" Duration="0">
-                                            <DiscreteObjectKeyFrame KeyTime="0">
-                                                <DiscreteObjectKeyFrame.Value>
-                                                    <Visibility>Collapsed</Visibility>
-                                                </DiscreteObjectKeyFrame.Value>
-                                            </DiscreteObjectKeyFrame>
-                                        </ObjectAnimationUsingKeyFrames>
-                                    </Storyboard>
-                                </VisualState>
-                                <VisualState x:Name="Open">
-                                    <Storyboard>
-                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Root" Storyboard.TargetProperty="Visibility" Duration="0">
-                                            <DiscreteObjectKeyFrame KeyTime="0">
-                                                <DiscreteObjectKeyFrame.Value>
-                                                    <Visibility>Visible</Visibility>
-                                                </DiscreteObjectKeyFrame.Value>
-                                            </DiscreteObjectKeyFrame>
-                                        </ObjectAnimationUsingKeyFrames>
-                                    </Storyboard>
-                                </VisualState>
-                            </VisualStateGroup>
-                        </VisualStateManager.VisualStateGroups>
-
                         <Grid x:Name="PART_WindowRoot" HorizontalAlignment="Left" VerticalAlignment="Top" MinWidth="{TemplateBinding MinWidth}" MinHeight="{TemplateBinding MinHeight}" Width="{TemplateBinding Width}" Height="{TemplateBinding Height}" >
                             <Grid.RenderTransform>
                                 <TransformGroup>
@@ -226,6 +198,11 @@
                             </Border>
                         </Grid>
                     </Grid>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="WindowState" Value="Closed">
+                            <Setter Property="Visibility" Value="Collapsed" />
+                        </Trigger>
+                    </ControlTemplate.Triggers>
                 </ControlTemplate>
             </Setter.Value>
         </Setter>

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ColorPicker/Themes/Generic.xaml

@@ -146,7 +146,7 @@
             <Setter.Value>
                 <ControlTemplate TargetType="{x:Type local:ColorPicker}">
                     <Grid>
-                        <ToggleButton x:Name="PART_ColorPickerToggleButton" IsTabStop="False" MinHeight="22" IsChecked="{Binding IsOpen, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
+                        <ToggleButton x:Name="PART_ColorPickerToggleButton" IsTabStop="True" MinHeight="22" IsChecked="{Binding IsOpen, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
                                       IsHitTestVisible="{Binding IsOpen, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource InverseBoolConverter}}"
                                       Style="{TemplateBinding ButtonStyle}">
                             <Grid Margin="2,2,0,2">

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/WPFToolkit.Extended.csproj

@@ -140,7 +140,6 @@
     <Compile Include="BusyIndicator\Implementation\BusyIndicator.cs" />
     <Compile Include="ButtonSpinner\Implementation\ButtonSpinner.cs" />
     <Compile Include="ChildWindow\Implementation\ChildWindow.cs" />
-    <Compile Include="ChildWindow\Implementation\VisualStates.ChildWindow.cs" />
     <Compile Include="ChildWindow\Implementation\WindowStartupLocation.cs" />
     <Compile Include="ChildWindow\Implementation\WindowState.cs" />
     <Compile Include="ButtonSpinner\Implementation\SpinDirection.cs" />