diff --git a/SunnyUI/Controls/DropItem/UIComboBoxItem.Designer.cs b/SunnyUI/Controls/DropItem/UIComboBoxItem.Designer.cs
index 5fda19b7..59e24a3b 100644
--- a/SunnyUI/Controls/DropItem/UIComboBoxItem.Designer.cs
+++ b/SunnyUI/Controls/DropItem/UIComboBoxItem.Designer.cs
@@ -28,38 +28,38 @@
         /// </summary>
         private void InitializeComponent()
         {
-            this.listBox = new Sunny.UI.UIListBox();
-            this.SuspendLayout();
+            listBox = new UIListBox();
+            SuspendLayout();
             // 
             // listBox
             // 
-            this.listBox.BackColor = System.Drawing.Color.Transparent;
-            this.listBox.Dock = System.Windows.Forms.DockStyle.Fill;
-            this.listBox.FillColor = System.Drawing.Color.White;
-            this.listBox.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
-            this.listBox.FormatString = "";
-            this.listBox.ItemSelectForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(235)))), ((int)(((byte)(243)))), ((int)(((byte)(255)))));
-            this.listBox.Location = new System.Drawing.Point(0, 0);
-            this.listBox.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
-            this.listBox.MinimumSize = new System.Drawing.Size(1, 1);
-            this.listBox.Name = "listBox";
-            this.listBox.Padding = new System.Windows.Forms.Padding(2);
-            this.listBox.Radius = 0;
-            this.listBox.Size = new System.Drawing.Size(184, 210);
-            this.listBox.TabIndex = 3;
-            this.listBox.Text = null;
-            this.listBox.Click += new System.EventHandler(this.ListBox_Click);
-            this.listBox.SelectedIndexChanged += new System.EventHandler(this.listBox_SelectedIndexChanged);
-            this.listBox.KeyDown += new System.Windows.Forms.KeyEventHandler(this.listBox_KeyDown);
+            listBox.BackColor = System.Drawing.Color.Transparent;
+            listBox.Dock = System.Windows.Forms.DockStyle.Fill;
+            listBox.FillColor = System.Drawing.Color.White;
+            listBox.Font = new System.Drawing.Font("宋体", 12F);
+            listBox.HoverColor = System.Drawing.Color.FromArgb(155, 200, 255);
+            listBox.ItemSelectForeColor = System.Drawing.Color.FromArgb(235, 243, 255);
+            listBox.Location = new System.Drawing.Point(0, 0);
+            listBox.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
+            listBox.MinimumSize = new System.Drawing.Size(1, 1);
+            listBox.Name = "listBox";
+            listBox.Padding = new System.Windows.Forms.Padding(2);
+            listBox.Radius = 0;
+            listBox.ShowText = false;
+            listBox.Size = new System.Drawing.Size(184, 210);
+            listBox.TabIndex = 3;
+            listBox.Text = null;
+            listBox.KeyDown += listBox_KeyDown;
+            listBox.Click += ListBox_Click;
+            listBox.SelectedIndexChanged += listBox_SelectedIndexChanged;
             // 
             // UIComboBoxItem
             // 
-            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
-            this.Controls.Add(this.listBox);
-            this.Name = "UIComboBoxItem";
-            this.Size = new System.Drawing.Size(184, 210);
-            this.ResumeLayout(false);
-
+            AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
+            Controls.Add(listBox);
+            Name = "UIComboBoxItem";
+            Size = new System.Drawing.Size(184, 210);
+            ResumeLayout(false);
         }
 
         #endregion
diff --git a/SunnyUI/Controls/DropItem/UIComboBoxItem.resx b/SunnyUI/Controls/DropItem/UIComboBoxItem.resx
index f298a7be..8b2ff64a 100644
--- a/SunnyUI/Controls/DropItem/UIComboBoxItem.resx
+++ b/SunnyUI/Controls/DropItem/UIComboBoxItem.resx
@@ -1,4 +1,64 @@
-<root>
+<?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
+    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="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <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
+    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
+    mimetype set.
+
+    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
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    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
+            : 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
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
   <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
     <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
     <xsd:element name="root" msdata:IsDataSet="true">
diff --git a/SunnyUI/Controls/UIComboBox.cs b/SunnyUI/Controls/UIComboBox.cs
index 1f997564..a78265c6 100644
--- a/SunnyUI/Controls/UIComboBox.cs
+++ b/SunnyUI/Controls/UIComboBox.cs
@@ -40,6 +40,7 @@
  * 2023-08-11: V3.4.1 Items.Clear后，DropDownStyle为DropDown时，不清空Text
  * 2023-12-26: V3.6.2 增加下拉界面的滚动条设置
  * 2024-01-27: V3.6.3 修复在窗体构造函数设置SelectedIndex报错
+ * 2024-10-28: V3.7.2 增加了SelectionChangeCommitted事件，下拉框显示鼠标点击条目时响应
 ******************************************************************************/
 
 using System;
@@ -71,6 +72,7 @@ namespace Sunny.UI
             ListBox.SelectedValueChanged += ListBox_SelectedValueChanged;
             ListBox.ItemsClear += ListBox_ItemsClear;
             ListBox.ItemsRemove += ListBox_ItemsRemove;
+            ListBox.MouseClick += ListBox_MouseClick;
 
             filterForm.BeforeListClick += ListBox_Click;
 
@@ -82,6 +84,19 @@ namespace Sunny.UI
             CreateInstance();
         }
 
+        private void ListBox_MouseClick(object sender, MouseEventArgs e)
+        {
+            //SelectionChangeCommitted
+            UIListBox listBox = (UIListBox)sender;
+            int index = listBox.IndexFromPoint(e.X, e.Y);
+            if (index != -1)
+            {
+                SelectionChangeCommitted?.Invoke(this, EventArgs.Empty);
+            }
+        }
+
+        public event EventHandler SelectionChangeCommitted;
+
         [Browsable(false)]
         public override string[] FormTranslatorProperties { get; }