diff --git a/SunnyUI/Forms/UIFormHelper.cs b/SunnyUI/Forms/UIFormHelper.cs
index ec2804c5..798674c1 100644
--- a/SunnyUI/Forms/UIFormHelper.cs
+++ b/SunnyUI/Forms/UIFormHelper.cs
@@ -22,6 +22,7 @@
  * 2021-06-27: V3.0.4 增加一个反馈的接口，Feedback，Page可将对象反馈给Frame
  * 2021-12-13: V3.0.9 增加全屏遮罩，Form的ShowDialogWithMask()扩展方法
  * 2022-07-17: V3.2.1 解决ShowNotifier打开多个，全部关闭时出错的问题
+ * 2023-07-27: V3.4.1 默认提示弹窗TopMost为true
 ******************************************************************************/
 
 using System;
@@ -197,7 +198,7 @@ namespace Sunny.UI
         public static bool ShowMessageDialog(this Form form, string message, string title, bool isShowCancel, UIStyle style)
         {
             UIMessageForm frm = new UIMessageForm();
-            frm.TopMost = form != null && form.TopMost;
+            frm.TopMost = true;
             frm.ShowMessage(message, title, isShowCancel, style);
             frm.ShowDialog();
             bool isOk = frm.IsOK;
@@ -215,7 +216,7 @@ namespace Sunny.UI
         /// <param name="showMask">显示遮罩层</param>
         /// <param name="topMost">置顶</param>
         /// <returns>结果</returns>
-        public static bool ShowMessageDialog(string message, string title, bool showCancelButton, UIStyle style, bool showMask = true, bool topMost = false)
+        public static bool ShowMessageDialog(string message, string title, bool showCancelButton, UIStyle style, bool showMask = true, bool topMost = true)
         {
             Point pt = SystemEx.GetCursorPos();
             Rectangle screen = Screen.GetBounds(pt);
@@ -238,37 +239,37 @@ namespace Sunny.UI
 
     public static class UIMessageBox
     {
-        public static void Show(string text, bool showMask = true, bool topMost = false)
+        public static void Show(string text, bool showMask = true, bool topMost = true)
         {
             Show(text, UILocalize.InfoTitle, UIStyle.Blue, UIMessageBoxButtons.OK, showMask, topMost);
         }
 
-        public static void ShowInfo(string text, bool showMask = true, bool topMost = false)
+        public static void ShowInfo(string text, bool showMask = true, bool topMost = true)
         {
             Show(text, UILocalize.InfoTitle, UIStyle.Gray, UIMessageBoxButtons.OK, showMask, topMost);
         }
 
-        public static void ShowSuccess(string text, bool showMask = true, bool topMost = false)
+        public static void ShowSuccess(string text, bool showMask = true, bool topMost = true)
         {
             Show(text, UILocalize.SuccessTitle, UIStyle.Green, UIMessageBoxButtons.OK, showMask, topMost);
         }
 
-        public static void ShowWarning(string text, bool showMask = true, bool topMost = false)
+        public static void ShowWarning(string text, bool showMask = true, bool topMost = true)
         {
             Show(text, UILocalize.WarningTitle, UIStyle.Orange, UIMessageBoxButtons.OK, showMask, topMost);
         }
 
-        public static void ShowError(string text, bool showMask = true, bool topMost = false)
+        public static void ShowError(string text, bool showMask = true, bool topMost = true)
         {
             Show(text, UILocalize.ErrorTitle, UIStyle.Red, UIMessageBoxButtons.OK, showMask, topMost);
         }
 
-        public static bool ShowAsk(string text, bool showMask = true, bool topMost = false)
+        public static bool ShowAsk(string text, bool showMask = true, bool topMost = true)
         {
             return Show(text, UILocalize.AskTitle, UIStyle.Blue, UIMessageBoxButtons.OKCancel, showMask, topMost);
         }
 
-        public static bool Show(string text, string caption, UIStyle style = UIStyle.Blue, UIMessageBoxButtons buttons = UIMessageBoxButtons.OK, bool showMask = true, bool topMost = false)
+        public static bool Show(string text, string caption, UIStyle style = UIStyle.Blue, UIMessageBoxButtons buttons = UIMessageBoxButtons.OK, bool showMask = true, bool topMost = true)
         {
             return UIMessageDialog.ShowMessageDialog(text, caption, buttons == UIMessageBoxButtons.OKCancel, style, showMask, topMost);
         }
@@ -289,8 +290,7 @@ namespace Sunny.UI
 
     public static class UIInputDialog
     {
-        public static bool InputStringDialog(ref string value, bool checkEmpty = true,
-            string desc = "请输入字符串：", UIStyle style = UIStyle.Blue, bool topMost = false, bool showMask = false)
+        public static bool InputStringDialog(ref string value, bool checkEmpty = true, string desc = "请输入字符串：", UIStyle style = UIStyle.Blue, bool topMost = true, bool showMask = false)
         {
             UIInputForm frm = new UIInputForm();
             frm.TopMost = topMost;
@@ -312,26 +312,22 @@ namespace Sunny.UI
             return false;
         }
 
-        public static bool InputStringDialog(this UIForm form, ref string value, bool checkEmpty = true,
-            string desc = "请输入字符串：", bool showMask = false)
+        public static bool InputStringDialog(this UIForm form, ref string value, bool checkEmpty = true, string desc = "请输入字符串：", bool showMask = false)
         {
-            return InputStringDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputStringDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputStringDialog(this UIPage form, ref string value, bool checkEmpty = true,
-            string desc = "请输入字符串：", bool showMask = false)
+        public static bool InputStringDialog(this UIPage form, ref string value, bool checkEmpty = true, string desc = "请输入字符串：", bool showMask = false)
         {
-            return InputStringDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputStringDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputStringDialog(this Form form, ref string value, bool checkEmpty = true,
-            string desc = "请输入字符串：", UIStyle style = UIStyle.Blue, bool showMask = false)
+        public static bool InputStringDialog(this Form form, ref string value, bool checkEmpty = true, string desc = "请输入字符串：", UIStyle style = UIStyle.Blue, bool showMask = false)
         {
-            return InputStringDialog(ref value, checkEmpty, desc, style, form != null && form.TopMost, showMask);
+            return InputStringDialog(ref value, checkEmpty, desc, style, true, showMask);
         }
 
-        public static bool InputPasswordDialog(ref string value, bool checkEmpty = true,
-            string desc = "请输入密码：", UIStyle style = UIStyle.Blue, bool topMost = false, bool showMask = false)
+        public static bool InputPasswordDialog(ref string value, bool checkEmpty = true, string desc = "请输入密码：", UIStyle style = UIStyle.Blue, bool topMost = true, bool showMask = false)
         {
             UIInputForm frm = new UIInputForm();
             frm.TopMost = topMost;
@@ -353,26 +349,22 @@ namespace Sunny.UI
             return false;
         }
 
-        public static bool InputPasswordDialog(this UIForm form, ref string value, bool checkEmpty = true,
-            string desc = "请输入密码：", bool showMask = false)
+        public static bool InputPasswordDialog(this UIForm form, ref string value, bool checkEmpty = true, string desc = "请输入密码：", bool showMask = false)
         {
-            return InputPasswordDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputPasswordDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputPasswordDialog(this UIPage form, ref string value, bool checkEmpty = true,
-            string desc = "请输入密码：", bool showMask = false)
+        public static bool InputPasswordDialog(this UIPage form, ref string value, bool checkEmpty = true, string desc = "请输入密码：", bool showMask = false)
         {
-            return InputPasswordDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputPasswordDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputPasswordDialog(this Form form, ref string value, bool checkEmpty = true,
-            string desc = "请输入密码：", UIStyle style = UIStyle.Blue, bool showMask = false)
+        public static bool InputPasswordDialog(this Form form, ref string value, bool checkEmpty = true, string desc = "请输入密码：", UIStyle style = UIStyle.Blue, bool showMask = false)
         {
-            return InputPasswordDialog(ref value, checkEmpty, desc, style, form != null && form.TopMost, showMask);
+            return InputPasswordDialog(ref value, checkEmpty, desc, style, true, showMask);
         }
 
-        public static bool InputIntegerDialog(ref int value, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = false, bool showMask = false)
+        public static bool InputIntegerDialog(ref int value, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = true, bool showMask = false)
         {
             UIInputForm frm = new UIInputForm();
             frm.TopMost = topMost;
@@ -395,8 +387,7 @@ namespace Sunny.UI
             return false;
         }
 
-        public static bool InputIntegerDialog(ref int value, int minimum, int maximum, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = false, bool showMask = false)
+        public static bool InputIntegerDialog(ref int value, int minimum, int maximum, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = true, bool showMask = false)
         {
             UIInputForm frm = new UIInputForm();
             frm.TopMost = topMost;
@@ -422,44 +413,37 @@ namespace Sunny.UI
             return false;
         }
 
-        public static bool InputIntegerDialog(this UIForm form, ref int value, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputIntegerDialog(this UIForm form, ref int value, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputIntegerDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputIntegerDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputIntegerDialog(this UIPage form, ref int value, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputIntegerDialog(this UIPage form, ref int value, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputIntegerDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputIntegerDialog(ref value, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputIntegerDialog(this Form form, ref int value, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
+        public static bool InputIntegerDialog(this Form form, ref int value, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
         {
-            return InputIntegerDialog(ref value, checkEmpty, desc, style, form != null && form.TopMost, showMask);
+            return InputIntegerDialog(ref value, checkEmpty, desc, style, true, showMask);
         }
 
-        public static bool InputIntegerDialog(this UIForm form, ref int value, int minimum, int maximum, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputIntegerDialog(this UIForm form, ref int value, int minimum, int maximum, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputIntegerDialog(ref value, minimum, maximum, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputIntegerDialog(ref value, minimum, maximum, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputIntegerDialog(this UIPage form, ref int value, int minimum, int maximum, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputIntegerDialog(this UIPage form, ref int value, int minimum, int maximum, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputIntegerDialog(ref value, minimum, maximum, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputIntegerDialog(ref value, minimum, maximum, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputIntegerDialog(this Form form, ref int value, int minimum, int maximum, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
+        public static bool InputIntegerDialog(this Form form, ref int value, int minimum, int maximum, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
         {
-            return InputIntegerDialog(ref value, minimum, maximum, checkEmpty, desc, style, form != null && form.TopMost, showMask);
+            return InputIntegerDialog(ref value, minimum, maximum, checkEmpty, desc, style, true, showMask);
         }
 
-        public static bool InputDoubleDialog(ref double value, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = false, bool showMask = false)
+        public static bool InputDoubleDialog(ref double value, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = true, bool showMask = false)
         {
             UIInputForm frm = new UIInputForm();
             frm.TopMost = topMost;
@@ -483,8 +467,7 @@ namespace Sunny.UI
             return false;
         }
 
-        public static bool InputDoubleDialog(ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = false, bool showMask = false)
+        public static bool InputDoubleDialog(ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool topMost = true, bool showMask = false)
         {
             UIInputForm frm = new UIInputForm();
             frm.TopMost = topMost;
@@ -510,46 +493,40 @@ namespace Sunny.UI
             return false;
         }
 
-        public static bool InputDoubleDialog(this UIForm form, ref double value, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputDoubleDialog(this UIForm form, ref double value, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputDoubleDialog(ref value, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputDoubleDialog(ref value, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputDoubleDialog(this UIPage form, ref double value, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputDoubleDialog(this UIPage form, ref double value, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputDoubleDialog(ref value, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputDoubleDialog(ref value, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputDoubleDialog(this Form form, ref double value, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
+        public static bool InputDoubleDialog(this Form form, ref double value, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
         {
-            return InputDoubleDialog(ref value, decimals, checkEmpty, desc, style, form != null && form.TopMost, showMask);
+            return InputDoubleDialog(ref value, decimals, checkEmpty, desc, style, true, showMask);
         }
 
-        public static bool InputDoubleDialog(this UIForm form, ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputDoubleDialog(this UIForm form, ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputDoubleDialog(ref value, minimum, maximum, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputDoubleDialog(ref value, minimum, maximum, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputDoubleDialog(this UIPage form, ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", bool showMask = false)
+        public static bool InputDoubleDialog(this UIPage form, ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", bool showMask = false)
         {
-            return InputDoubleDialog(ref value, minimum, maximum, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost, showMask);
+            return InputDoubleDialog(ref value, minimum, maximum, decimals, checkEmpty, desc, form != null ? form.Style : UIStyle.Blue, true, showMask);
         }
 
-        public static bool InputDoubleDialog(this Form form, ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true,
-            string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
+        public static bool InputDoubleDialog(this Form form, ref double value, double minimum, double maximum, int decimals = 2, bool checkEmpty = true, string desc = "请输入数字：", UIStyle style = UIStyle.Blue, bool showMask = false)
         {
-            return InputDoubleDialog(ref value, minimum, maximum, decimals, checkEmpty, desc, style, form != null && form.TopMost, showMask);
+            return InputDoubleDialog(ref value, minimum, maximum, decimals, checkEmpty, desc, style, true, showMask);
         }
     }
 
     public static class UISelectDialog
     {
-        public static bool ShowSelectDialog(this Form form, ref int selectIndex, IList items, string title, string description, UIStyle style = UIStyle.Blue, bool topMost = false)
+        public static bool ShowSelectDialog(this Form form, ref int selectIndex, IList items, string title, string description, UIStyle style = UIStyle.Blue, bool topMost = true)
         {
             UISelectForm frm = new UISelectForm();
             frm.TopMost = topMost;
@@ -572,7 +549,7 @@ namespace Sunny.UI
 
         public static bool ShowSelectDialog(this Form form, ref int selectIndex, IList items, UIStyle style = UIStyle.Blue)
         {
-            return form.ShowSelectDialog(ref selectIndex, items, UILocalize.SelectTitle, "", style, form != null && form.TopMost);
+            return form.ShowSelectDialog(ref selectIndex, items, UILocalize.SelectTitle, "", style, true);
         }
 
         public static bool ShowSelectDialog(this UIForm form, ref int selectIndex, IList items)
@@ -587,12 +564,12 @@ namespace Sunny.UI
 
         public static bool ShowSelectDialog(this UIForm form, ref int selectIndex, IList items, string title, string description)
         {
-            return form.ShowSelectDialog(ref selectIndex, items, title, description, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost);
+            return form.ShowSelectDialog(ref selectIndex, items, title, description, form != null ? form.Style : UIStyle.Blue, true);
         }
 
         public static bool ShowSelectDialog(this UIPage form, ref int selectIndex, IList items, string title, string description)
         {
-            return form.ShowSelectDialog(ref selectIndex, items, title, description, form != null ? form.Style : UIStyle.Blue, form != null && form.TopMost);
+            return form.ShowSelectDialog(ref selectIndex, items, title, description, form != null ? form.Style : UIStyle.Blue, true);
         }
     }