diff --git a/SunnyUI/Controls/UITitlePanel.Designer.cs b/SunnyUI/Controls/UITitlePanel.Designer.cs
index 3c1aea9b..2ad3b364 100644
--- a/SunnyUI/Controls/UITitlePanel.Designer.cs
+++ b/SunnyUI/Controls/UITitlePanel.Designer.cs
@@ -28,14 +28,13 @@
         /// </summary>
         private void InitializeComponent()
         {
-            this.SuspendLayout();
+            SuspendLayout();
             // 
             // UITitlePanel
             // 
-            this.Name = "UITitlePanel";
-            this.Padding = new System.Windows.Forms.Padding(0, 35, 0, 0);
-            this.ResumeLayout(false);
-
+            Name = "UITitlePanel";
+            VisibleChanged += UITitlePanel_VisibleChanged;
+            ResumeLayout(false);
         }
 
         #endregion
diff --git a/SunnyUI/Controls/UITitlePanel.cs b/SunnyUI/Controls/UITitlePanel.cs
index d0086810..1eebb49f 100644
--- a/SunnyUI/Controls/UITitlePanel.cs
+++ b/SunnyUI/Controls/UITitlePanel.cs
@@ -25,6 +25,7 @@
  * 2023-05-02: V3.3.6 增加了一个关闭按钮的属性，点击后隐藏控件
  * 2023-05-12: V3.3.6 标题栏文字位置属性由TextAlign改为TextAlignment
  * 2023-05-12: V3.3.6 重构DrawString函数
+ * 2023-07-12: V3.4.0 删除Padding设置
 ******************************************************************************/
 
 using System;
@@ -50,32 +51,12 @@ namespace Sunny.UI
                 if (_titleHeight != value)
                 {
                     _titleHeight = Math.Max(19, value);
-                    Padding = new Padding(Padding.Left, Math.Max(value, Padding.Top), Padding.Right, Padding.Bottom);
                     CalcSystemBoxPos();
                     Invalidate();
                 }
             }
         }
 
-        protected override void OnPaddingChanged(EventArgs e)
-        {
-            base.OnPaddingChanged(e);
-            if (Padding.Top != Math.Max(TitleHeight, Padding.Top))
-            {
-                Padding = new Padding(Padding.Left, Math.Max(TitleHeight, Padding.Top), Padding.Right, Padding.Bottom);
-            }
-        }
-
-        protected override void OnControlAdded(ControlEventArgs e)
-        {
-            base.OnControlAdded(e);
-
-            if (e.Control.Top < TitleHeight)
-            {
-                e.Control.Top = TitleHeight + 1;
-            }
-        }
-
         public UITitlePanel()
         {
             InitializeComponent();
@@ -390,5 +371,16 @@ namespace Sunny.UI
 
             base.OnMouseDoubleClick(e);
         }
+
+        private void UITitlePanel_VisibleChanged(object sender, EventArgs e)
+        {
+            foreach (Control control in Controls)
+            {
+                if (control.Top < TitleHeight)
+                {
+                    control.Top = TitleHeight + 1;
+                }
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/SunnyUI/Controls/UITitlePanel.resx b/SunnyUI/Controls/UITitlePanel.resx
index 1af7de15..a395bffc 100644
--- a/SunnyUI/Controls/UITitlePanel.resx
+++ b/SunnyUI/Controls/UITitlePanel.resx
@@ -1,24 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
-  <!-- 
+  <!--
     Microsoft ResX Schema 
-    
+
     Version 2.0
-    
-    The primary goals of this format is to allow a simple XML format 
-    that is mostly human readable. The generation and parsing of the 
-    various data types are done through the TypeConverter classes 
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
     associated with the data types.
-    
+
     Example:
-    
+
     ... ado.net/XML headers & schema ...
     <resheader name="resmimetype">text/microsoft-resx</resheader>
     <resheader name="version">2.0</resheader>
     <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
     <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
     <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing"">Blue</data>
     <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
         <value>[base64 mime encoded serialized .NET Framework object]</value>
     </data>
@@ -26,36 +26,36 @@
         <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
         <comment>This is a comment</comment>
     </data>
-                
-    There are any number of "resheader" rows that contain simple 
+
+    There are any number of "resheader" rows that contain simple
     name/value pairs.
-    
-    Each data row contains a name, and value. The row also contains a 
-    type or mimetype. Type corresponds to a .NET class that support 
-    text/value conversion through the TypeConverter architecture. 
-    Classes that don't support this are serialized and stored with the 
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
     mimetype set.
-    
-    The mimetype is used for serialized objects, and tells the 
-    ResXResourceReader how to depersist the object. This is currently not 
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
     extensible. For a given mimetype the value must be set accordingly:
-    
-    Note - application/x-microsoft.net.object.binary.base64 is the format 
-    that the ResXResourceWriter will generate, however the reader can 
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
     read any of the formats listed below.
-    
+
     mimetype: application/x-microsoft.net.object.binary.base64
-    value   : The object must be serialized with 
+    value   : The object must be serialized with
             : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
             : and then encoded with base64 encoding.
     
     mimetype: application/x-microsoft.net.object.soap.base64
-    value   : The object must be serialized with 
+    value   : The object must be serialized with
             : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
             : and then encoded with base64 encoding.
 
     mimetype: application/x-microsoft.net.object.bytearray.base64
-    value   : The object must be serialized into a byte array 
+    value   : The object must be serialized into a byte array
             : using a System.ComponentModel.TypeConverter
             : and then encoded with base64 encoding.
     -->