diff --git a/demo/Ursa.Demo/Pages/NumPadDemo.axaml b/demo/Ursa.Demo/Pages/NumPadDemo.axaml
index dbd997a..2e657ec 100644
--- a/demo/Ursa.Demo/Pages/NumPadDemo.axaml
+++ b/demo/Ursa.Demo/Pages/NumPadDemo.axaml
@@ -21,11 +21,21 @@
             HorizontalAlignment="Stretch"
             u:NumPad.Attach="True"
             Watermark="Invoke NumPad" />
-        <u:IPv4Box Width="200" u:NumPad.Attach="True" />
+        <u:IPv4Box
+            Width="200"
+            u:NumPad.Attach="True"
+            InputMode="Fast"
+            ShowLeadingZero="False" />
         <u:NumericIntUpDown
             HorizontalAlignment="Stretch"
             u:NumPad.Attach="True"
-            Watermark="Invoke NumPad" />
+            Watermark="Invoke u:NumericIntUpDown" />
+
+        <NumericUpDown
+            u:NumPad.Attach="True"
+            ButtonSpinnerLocation="Left"
+            Watermark="NumericUpDown" />
+
         <Border Theme="{DynamicResource CardBorder}">
             <StackPanel>
                 <TextBox Name="text" Width="200" />
diff --git a/src/Ursa.Themes.Semi/Controls/NumPad.axaml b/src/Ursa.Themes.Semi/Controls/NumPad.axaml
index e2aed73..372f7d3 100644
--- a/src/Ursa.Themes.Semi/Controls/NumPad.axaml
+++ b/src/Ursa.Themes.Semi/Controls/NumPad.axaml
@@ -92,7 +92,7 @@
                         </u:NumPadButton>
                         <u:NumPadButton
                             Grid.Row="1"
-                            Grid.RowSpan="2"
+                            Grid.RowSpan="1"
                             Grid.Column="3"
                             Height="{x:Static x:Double.NaN}"
                             VerticalAlignment="Stretch"
@@ -100,6 +100,16 @@
                             FunctionKey="Add"
                             NumContent="+"
                             NumKey="Add" />
+                        <u:NumPadButton
+                            Grid.Row="2"
+                            Grid.RowSpan="1"
+                            Grid.Column="3"
+                            Height="{x:Static x:Double.NaN}"
+                            VerticalAlignment="Stretch"
+                            FunctionContent="←"
+                            FunctionKey="Back"
+                            NumContent="←"
+                            NumKey="Back" />
                         <u:NumPadButton
                             Grid.Row="2"
                             Grid.Column="0"
diff --git a/src/Ursa/Controls/IPv4Box/IPv4Box.cs b/src/Ursa/Controls/IPv4Box/IPv4Box.cs
index 1dda35d..cea14fa 100644
--- a/src/Ursa/Controls/IPv4Box/IPv4Box.cs
+++ b/src/Ursa/Controls/IPv4Box/IPv4Box.cs
@@ -107,7 +107,25 @@ public class IPv4Box: TemplatedControl
             e.Client = tb._imClient;
         });
     }
-    
+
+    /// <summary>
+    /// �Ƿ�ʹ��С��������
+    /// </summary>
+    internal bool IsTargetByNumPad 
+    {
+        set
+        {
+            if(_isTargetByNumPad
+                &&!value)
+            {
+                SetLostFocus();
+            }
+            _isTargetByNumPad =value;
+        }
+        get => _isTargetByNumPad;
+    }
+    private bool _isTargetByNumPad;
+
     #region Overrides
     protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
     {
@@ -308,6 +326,15 @@ public class IPv4Box: TemplatedControl
     protected override void OnLostFocus(RoutedEventArgs e)
     {
         base.OnLostFocus(e);
+        if (IsTargetByNumPad)
+        {
+            return;
+        }
+        SetLostFocus();
+    }
+
+    private void SetLostFocus()
+    {
         foreach (var pre in _presenters)
         {
             pre?.HideCaret();
@@ -317,7 +344,8 @@ public class IPv4Box: TemplatedControl
         ParseBytes(ShowLeadingZero);
         SetIPAddressInternal();
     }
-    
+
+
     protected override void OnGotFocus(GotFocusEventArgs e)
     {
         _currentActivePresenter = _firstText;
diff --git a/src/Ursa/Controls/NumPad/NumPad.cs b/src/Ursa/Controls/NumPad/NumPad.cs
index 3777dab..6f81bb7 100644
--- a/src/Ursa/Controls/NumPad/NumPad.cs
+++ b/src/Ursa/Controls/NumPad/NumPad.cs
@@ -1,6 +1,9 @@
 using Avalonia;
+using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
+using Avalonia.Controls.Templates;
 using Avalonia.Input;
+using Avalonia.LogicalTree;
 using Irihi.Avalonia.Shared.Helpers;
 
 namespace Ursa.Controls;
@@ -16,6 +19,11 @@ public class NumPad: TemplatedControl
         set => SetValue(TargetProperty, value);
     }
 
+    /// <summary>
+    /// Target Ŀ���ڲ��� TextBox �� TextPresenter �ؼ� 
+    /// </summary>
+    private TextBox? _targetInnerText;
+
     public static readonly StyledProperty<bool> NumModeProperty = AvaloniaProperty.Register<NumPad, bool>(
         nameof(NumMode), defaultValue: true);
 
@@ -54,10 +62,24 @@ public class NumPad: TemplatedControl
         var existing = OverlayDialog.Recall<NumPad>(null);
         if (existing is not null)
         {
+            if(existing.Target is IPv4Box pv4Box)
+            {
+                pv4Box.IsTargetByNumPad = false; // ȡ�� IPv4Box �� NumPad ����ģʽ
+            }
             existing.Target = sender as InputElement;
+            existing._targetInnerText = FindTextBoxInTarget((sender as InputElement)!);
+
+            if (existing.Target is IPv4Box pv4Box2)
+            {
+                pv4Box2.IsTargetByNumPad = true;
+            }
             return;
         }
-        var numPad = new NumPad() { Target = sender as InputElement };
+        var numPad = new NumPad() 
+        {
+            Target = sender as InputElement ,
+            _targetInnerText = FindTextBoxInTarget((sender as InputElement)!)
+        };
         OverlayDialog.Show(numPad, new object(), options: new OverlayDialogOptions() { Buttons = DialogButton.None });
     }
 
@@ -84,9 +106,12 @@ public class NumPad: TemplatedControl
     {
         if (Target is null || o is not NumPadButton b) return;
         var key = (b.NumMode ? b.NumKey : b.FunctionKey)?? Key.None;
+
+        // ��������ڲ�Ϊ TextBox ��Ŀ��ؼ�����ʹ�ø� TextBox ��Ϊ����Ŀ��
+        var realTarget = _targetInnerText ?? Target;
         if (KeyInputMapping.TryGetValue(key, out var s))
         {
-            Target.RaiseEvent(new TextInputEventArgs()
+            realTarget.RaiseEvent(new TextInputEventArgs()
             {
                 Source = this,
                 RoutedEvent = TextInputEvent,
@@ -95,7 +120,7 @@ public class NumPad: TemplatedControl
         }
         else
         {
-            Target.RaiseEvent(new KeyEventArgs()
+            realTarget.RaiseEvent(new KeyEventArgs()
             {
                 Source = this,
                 RoutedEvent = KeyDownEvent,
@@ -103,4 +128,33 @@ public class NumPad: TemplatedControl
             });
         }
     }
+    /// <summary>
+    /// ��Ŀ��ؼ��в��� TextBox �ؼ�
+    /// </summary>
+    /// <param name="target">Ŀ��ؼ�</param>
+    /// <returns>�ҵ��� TextBox�����û���ҵ��򷵻� null</returns>
+    private static TextBox? FindTextBoxInTarget(InputElement target)
+    {
+        // ���Ŀ�걾������ TextBox
+        if (target is TextBox textBox)
+            return textBox;
+        
+        // ���Ŀ���� TemplatedControl�������Ѿ�Ӧ����ģ��
+        if (target is TemplatedControl templatedControl && templatedControl.IsInitialized)
+        {
+            // ����ͨ��ģ����� PART_TextBox
+            if (templatedControl.GetTemplateChildren().FirstOrDefault(c => c is TextBox) is TextBox partTextBox)
+                return partTextBox;
+        }
+
+        // ���Ŀ���� ILogical��ʹ�� LogicalTree ��չ��������
+        if (target is ILogical logical)
+        {
+            // ʹ�� GetLogicalDescendants �������������߼��ӿؼ�
+            var textBoxes = logical.GetLogicalDescendants().OfType<TextBox>();
+            return textBoxes.FirstOrDefault();
+        }
+
+        return null;
+    }
 }
\ No newline at end of file