diff --git a/v2rayN/v2rayN/Mode/EViewAction.cs b/v2rayN/v2rayN/Mode/EViewAction.cs
index 39da1cf3..77324c6c 100644
--- a/v2rayN/v2rayN/Mode/EViewAction.cs
+++ b/v2rayN/v2rayN/Mode/EViewAction.cs
@@ -1,10 +1,7 @@
-
-using System.ComponentModel;
-
-namespace v2rayN.Mode
+namespace v2rayN.Mode
 {
     public enum EViewAction
-    {       
+    {
         AdjustMainLvColWidth,
         ProfilesFocus
 
diff --git a/v2rayN/v2rayN/Tool/Utils.cs b/v2rayN/v2rayN/Tool/Utils.cs
index d7e0af75..3518455c 100644
--- a/v2rayN/v2rayN/Tool/Utils.cs
+++ b/v2rayN/v2rayN/Tool/Utils.cs
@@ -1177,47 +1177,44 @@ namespace v2rayN
 
         #region scan screen
 
-        public static string ScanScreen()
+        public static string ScanScreen(float dpiX, float dpiY)
         {
             try
             {
-                foreach (var screen in System.Windows.Forms.Screen.AllScreens)
+                var left = (int)(SystemParameters.WorkArea.Left);
+                var top = (int)(SystemParameters.WorkArea.Top);
+                var width = (int)(SystemParameters.WorkArea.Width / dpiX);
+                var height = (int)(SystemParameters.WorkArea.Height / dpiY);
+
+                using Bitmap fullImage = new Bitmap(width, height);
+                using (Graphics g = Graphics.FromImage(fullImage))
                 {
-                    var left = screen.Bounds.X;
-                    var top = screen.Bounds.Y;
-                    var width = screen.Bounds.Width;
-                    var height = screen.Bounds.Height;
+                    g.CopyFromScreen(left, top, 0, 0, fullImage.Size, CopyPixelOperation.SourceCopy);
+                }
+                int maxTry = 10;
+                for (int i = 0; i < maxTry; i++)
+                {
+                    int marginLeft = (int)((double)fullImage.Width * i / 2.5 / maxTry);
+                    int marginTop = (int)((double)fullImage.Height * i / 2.5 / maxTry);
+                    Rectangle cropRect = new(marginLeft, marginTop, fullImage.Width - marginLeft * 2, fullImage.Height - marginTop * 2);
+                    Bitmap target = new(width, height);
 
-                    using Bitmap fullImage = new Bitmap(width, height);
-                    using (Graphics g = Graphics.FromImage(fullImage))
+                    double imageScale = (double)width / (double)cropRect.Width;
+                    using (Graphics g = Graphics.FromImage(target))
                     {
-                        g.CopyFromScreen(left, top, 0, 0, fullImage.Size, CopyPixelOperation.SourceCopy);
+                        g.DrawImage(fullImage, new Rectangle(0, 0, target.Width, target.Height),
+                                        cropRect,
+                                        GraphicsUnit.Pixel);
                     }
-                    int maxTry = 10;
-                    for (int i = 0; i < maxTry; i++)
+
+                    BitmapLuminanceSource source = new(target);
+                    BinaryBitmap bitmap = new(new HybridBinarizer(source));
+                    QRCodeReader reader = new();
+                    Result result = reader.decode(bitmap);
+                    if (result != null)
                     {
-                        int marginLeft = (int)((double)fullImage.Width * i / 2.5 / maxTry);
-                        int marginTop = (int)((double)fullImage.Height * i / 2.5 / maxTry);
-                        Rectangle cropRect = new(marginLeft, marginTop, fullImage.Width - marginLeft * 2, fullImage.Height - marginTop * 2);
-                        Bitmap target = new(width, height);
-
-                        double imageScale = (double)width / (double)cropRect.Width;
-                        using (Graphics g = Graphics.FromImage(target))
-                        {
-                            g.DrawImage(fullImage, new Rectangle(0, 0, target.Width, target.Height),
-                                            cropRect,
-                                            GraphicsUnit.Pixel);
-                        }
-
-                        BitmapLuminanceSource source = new(target);
-                        BinaryBitmap bitmap = new(new HybridBinarizer(source));
-                        QRCodeReader reader = new();
-                        Result result = reader.decode(bitmap);
-                        if (result != null)
-                        {
-                            string ret = result.Text;
-                            return ret;
-                        }
+                        string ret = result.Text;
+                        return ret;
                     }
                 }
             }
@@ -1228,6 +1225,14 @@ namespace v2rayN
             return string.Empty;
         }
 
+        public static Tuple<float, float> GetDpiXY(Window window)
+        {
+            IntPtr hWnd = new WindowInteropHelper(window).EnsureHandle();
+            Graphics g = Graphics.FromHwnd(hWnd);
+
+            return new(96 / g.DpiX, 96 / g.DpiY);
+        }
+
         #endregion
 
 
diff --git a/v2rayN/v2rayN/ViewModels/MainWindowViewModel.cs b/v2rayN/v2rayN/ViewModels/MainWindowViewModel.cs
index 8afdbfa9..785678e1 100644
--- a/v2rayN/v2rayN/ViewModels/MainWindowViewModel.cs
+++ b/v2rayN/v2rayN/ViewModels/MainWindowViewModel.cs
@@ -20,7 +20,6 @@ using v2rayN.Mode;
 using v2rayN.Resx;
 using v2rayN.Tool;
 using v2rayN.Views;
-using Application = System.Windows.Application;
 
 
 namespace v2rayN.ViewModels
@@ -924,9 +923,10 @@ namespace v2rayN.ViewModels
         {
             ShowHideWindow(false);
 
+            var dpiXY = Utils.GetDpiXY(Application.Current.MainWindow);
             string result = await Task.Run(() =>
             {
-                return Utils.ScanScreen();
+                return Utils.ScanScreen(dpiXY.Item1, dpiXY.Item2);
             });
 
             ShowHideWindow(true);
diff --git a/v2rayN/v2rayN/Views/MainWindow.xaml.cs b/v2rayN/v2rayN/Views/MainWindow.xaml.cs
index ef8070a8..ea2fc4fd 100644
--- a/v2rayN/v2rayN/Views/MainWindow.xaml.cs
+++ b/v2rayN/v2rayN/Views/MainWindow.xaml.cs
@@ -1,7 +1,6 @@
 using ReactiveUI;
 using Splat;
 using System.ComponentModel;
-using System.Drawing;
 using System.Reactive.Disposables;
 using System.Windows;
 using System.Windows.Controls;
@@ -420,11 +419,8 @@ namespace v2rayN.Views
                 Height = _config.uiItem.mainHeight;
             }
 
-            //IntPtr hWnd = new WindowInteropHelper(this).EnsureHandle();
-            //Graphics g = Graphics.FromHwnd(hWnd);
-            //var dip = 96;
-            var maxWidth = SystemParameters.WorkArea.Width;// * dip / g.DpiX;
-            var maxHeight = SystemParameters.WorkArea.Height;// * dip / g.DpiY;
+            var maxWidth = SystemParameters.WorkArea.Width;
+            var maxHeight = SystemParameters.WorkArea.Height;
             if (Width > maxWidth) Width = maxWidth;
             if (Height > maxHeight) Height = maxHeight;
             if (_config.uiItem.mainGirdHeight1 > 0 && _config.uiItem.mainGirdHeight2 > 0)