MessageBox: added ability to define any content for the message box buttons. So you ar enot limited to just text such as "Yes" or "No", but instead you can it to any content such as UI elements and images.

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

@@ -73,6 +73,13 @@ namespace Microsoft.Windows.Controls
             set { SetValue(CaptionForegroundProperty, value); }
         }
 
+        public static readonly DependencyProperty CancelButtonContentProperty = DependencyProperty.Register("CancelButtonContent", typeof(object), typeof(MessageBox), new UIPropertyMetadata("Cancel"));
+        public object CancelButtonContent
+        {
+            get { return (object)GetValue(CancelButtonContentProperty); }
+            set { SetValue(CancelButtonContentProperty, value); }
+        }
+
         public static readonly DependencyProperty CloseButtonStyleProperty = DependencyProperty.Register("CloseButtonStyle", typeof(Style), typeof(MessageBox), new PropertyMetadata(null));
         public Style CloseButtonStyle
         {
@@ -87,6 +94,20 @@ namespace Microsoft.Windows.Controls
             set { SetValue(ImageSourceProperty, value); }
         }
 
+        public static readonly DependencyProperty NoButtonContentProperty = DependencyProperty.Register("NoButtonContent", typeof(object), typeof(MessageBox), new UIPropertyMetadata("No"));
+        public object NoButtonContent
+        {
+            get { return (object)GetValue(NoButtonContentProperty); }
+            set { SetValue(NoButtonContentProperty, value); }
+        }
+
+        public static readonly DependencyProperty OkButtonContentProperty = DependencyProperty.Register("OkButtonContent", typeof(object), typeof(MessageBox), new UIPropertyMetadata("OK"));
+        public object OkButtonContent
+        {
+            get { return (object)GetValue(OkButtonContentProperty); }
+            set { SetValue(OkButtonContentProperty, value); }
+        }
+
         public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(MessageBox), new UIPropertyMetadata(String.Empty));
         public string Text
         {
@@ -115,6 +136,13 @@ namespace Microsoft.Windows.Controls
             set { SetValue(WindowOpacityProperty, value); }
         }
 
+        public static readonly DependencyProperty YesButtonContentProperty = DependencyProperty.Register("YesButtonContent", typeof(object), typeof(MessageBox), new UIPropertyMetadata("Yes"));
+        public object YesButtonContent
+        {
+            get { return (object)GetValue(YesButtonContentProperty); }
+            set { SetValue(YesButtonContentProperty, value); }
+        }
+
         #endregion //Dependency Properties
 
         #endregion //Properties
@@ -446,8 +474,8 @@ namespace Microsoft.Windows.Controls
             newWindow.AllowsTransparency = true;
             newWindow.Background = Brushes.Transparent;
             newWindow.Content = this;
-            newWindow.Owner = _owner ?? ResolveOwnerWindow();   
-         
+            newWindow.Owner = _owner ?? ResolveOwnerWindow();
+
             if (newWindow.Owner != null)
                 newWindow.WindowStartupLocation = System.Windows.WindowStartupLocation.CenterOwner;
             else

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

@@ -256,10 +256,10 @@
                                                 <ColumnDefinition Width="Auto"/>
                                                 <ColumnDefinition Width="Auto"/>
                                             </Grid.ColumnDefinitions>
-                                            <Button Grid.Column="0" x:Name="PART_YesButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed">Yes</Button>
-                                            <Button Grid.Column="1" x:Name="PART_NoButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed">No</Button>
-                                            <Button Grid.Column="2" x:Name="PART_OkButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed">OK</Button>
-                                            <Button Grid.Column="3" x:Name="PART_CancelButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed">Cancel</Button>
+                                            <Button Grid.Column="0" x:Name="PART_YesButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed" Content="{TemplateBinding YesButtonContent}" />
+                                            <Button Grid.Column="1" x:Name="PART_NoButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed" Content="{TemplateBinding NoButtonContent}" />
+                                            <Button Grid.Column="2" x:Name="PART_OkButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed" Content="{TemplateBinding OkButtonContent}" />
+                                            <Button Grid.Column="3" x:Name="PART_CancelButton" MinWidth="65" Margin="6,0,0,0" Visibility="Collapsed" Content="{TemplateBinding CancelButtonContent}" />
                                         </Grid>
                                     </Grid>
                                 </Border>