diff --git a/Wox/ResultPanel.xaml b/Wox/ResultPanel.xaml
index b57540be80..66860283d6 100644
--- a/Wox/ResultPanel.xaml
+++ b/Wox/ResultPanel.xaml
@@ -11,7 +11,8 @@
     </UserControl.Resources>
 
     <Grid x:Name="gridContainer">
-        <ListBox x:Name="lbResults" PreviewMouseDown="LbResults_OnPreviewMouseDown" Style="{DynamicResource BaseListboxStyle}" SelectionChanged ="lbResults_SelectionChanged"  Focusable="False"  KeyboardNavigation.DirectionalNavigation="Cycle" SelectionMode="Single" VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Standard">
+        <!-- set max height of listbox to allow 6 results showed at once -->
+        <ListBox x:Name="lbResults" MaxHeight="300" PreviewMouseDown="LbResults_OnPreviewMouseDown" Style="{DynamicResource BaseListboxStyle}" SelectionChanged ="lbResults_SelectionChanged"  Focusable="False"  KeyboardNavigation.DirectionalNavigation="Cycle" SelectionMode="Single" VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Standard">
             <ListBox.Resources>
                 <!--SelectedItem with focus-->
                 <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="{DynamicResource ItemSelectedBackgroundColor}"/>
@@ -20,6 +21,7 @@
             </ListBox.Resources>
             <ListBox.ItemTemplate>
                 <DataTemplate>
+                    <!-- a result item height is 50 including margin -->
                     <Grid HorizontalAlignment="Stretch" Height="40" VerticalAlignment="Stretch" Margin="5"  Cursor="Hand">
                         <Grid.ColumnDefinitions>
                             <ColumnDefinition Width="32"></ColumnDefinition>
diff --git a/Wox/ResultPanel.xaml.cs b/Wox/ResultPanel.xaml.cs
index af601c9883..1afa90061e 100644
--- a/Wox/ResultPanel.xaml.cs
+++ b/Wox/ResultPanel.xaml.cs
@@ -6,6 +6,7 @@ using System.Windows.Controls;
 using System.Windows.Forms;
 using System.Windows.Input;
 using System.Windows.Media;
+using System.Windows.Media.Animation;
 using Wox.Helper;
 using Wox.Infrastructure;
 using Wox.Plugin;
@@ -42,6 +43,12 @@ namespace Wox
             SelectFirst();
         }
 
+        public void AnimateListBoxResultChange()
+        {
+            //todo:
+            var da = new DoubleAnimation(lbResults.ActualHeight, ActualWidth + 100, new Duration(new TimeSpan(0, 0, 0, 0, 1600)));
+        }
+
         private int GetInsertLocation(int currentScore)
         {
             int location = lbResults.Items.Count;