diff --git a/SunnyUI/Controls/UITextBox.cs b/SunnyUI/Controls/UITextBox.cs
index 147ff54e..37a0d044 100644
--- a/SunnyUI/Controls/UITextBox.cs
+++ b/SunnyUI/Controls/UITextBox.cs
@@ -32,6 +32,7 @@
  * 2022-01-07: V3.1.0 按钮支持自定义颜色
  * 2022-02-16: V3.1.1 增加了只读的颜色设置
  * 2022-03-14: V3.1.1 增加滚动条的颜色设置
+ * 2022-04-11: V3.1.3 增加对按钮设置ToolTip
 ******************************************************************************/
 
 using System;
@@ -119,6 +120,11 @@ namespace Sunny.UI
             TextAlignmentChange += UITextBox_TextAlignmentChange;
         }
 
+        public void SetButtonToolTip(ToolTip toolTip, string tipText)
+        {
+            toolTip.SetToolTip(btn, tipText);
+        }
+
         /// <summary>
         /// 填充颜色，当值为背景色或透明色或空值则不填充
         /// </summary>
diff --git a/SunnyUI/Controls/UIToolTip.cs b/SunnyUI/Controls/UIToolTip.cs
index 5c6f34a5..407cd87c 100644
--- a/SunnyUI/Controls/UIToolTip.cs
+++ b/SunnyUI/Controls/UIToolTip.cs
@@ -71,6 +71,15 @@ namespace Sunny.UI
         [DefaultValue(typeof(Size), "100, 70"), Description("不自动缩放时大小"), Category("SunnyUI")]
         public Size Size { get; set; } = new Size(100, 70);
 
+        public new void SetToolTip(Control control, string caption)
+        {
+            base.SetToolTip(control, caption);
+            if (control is IToolTip toolTip)
+            {
+                base.SetToolTip(toolTip.ExToolTipControl(), caption);
+            }
+        }
+
         public void SetToolTip(Control control, string caption, string title, int symbol, int symbolSize,
             Color symbolColor)
         {