diff --git a/Ink Canvas/MainWindow.xaml.cs b/Ink Canvas/MainWindow.xaml.cs
index 23b5565d..a6979eb6 100644
--- a/Ink Canvas/MainWindow.xaml.cs	
+++ b/Ink Canvas/MainWindow.xaml.cs	
@@ -28,44 +28,7 @@ namespace Ink_Canvas {
         private System.Windows.Controls.Canvas currentCanvas = null;
         private AutoUpdateHelper.UpdateLineGroup AvailableLatestLineGroup = null;
 
-        // Win32 API声明和常量（用于无焦点窗口）
-        [DllImport("user32.dll")]
-        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
-        [DllImport("user32.dll")]
-        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
-        private const int GWL_EXSTYLE = -20;
-        private const int WS_EX_NOACTIVATE = 0x08000000;
-        [DllImport("user32.dll")]
-        private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
-        private static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
-        private static readonly IntPtr HWND_NOTOPMOST = new IntPtr(-2);
-        private const uint SWP_NOSIZE = 0x0001;
-        private const uint SWP_NOMOVE = 0x0002;
-        private const uint SWP_NOACTIVATE = 0x0010;
-        private const uint SWP_SHOWWINDOW = 0x0040;
-        
-        // 新增：设置窗口置顶并兼容无焦点
-        private void SetTopmostWithNoActivate(bool topmost)
-        {
-            var hwnd = new WindowInteropHelper(this).Handle;
-            int exStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
-            // 先移除 WS_EX_NOACTIVATE
-            SetWindowLong(hwnd, GWL_EXSTYLE, exStyle & ~WS_EX_NOACTIVATE);
-            // 设置 Topmost
-            this.Topmost = topmost;
-            // 使用SetWindowPos确保无焦点置顶
-            if (topmost)
-            {
-                SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_SHOWWINDOW);
-            }
-            else
-            {
-                SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_SHOWWINDOW);
-            }
-            // 再加回 WS_EX_NOACTIVATE
-            exStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
-            SetWindowLong(hwnd, GWL_EXSTYLE, exStyle | WS_EX_NOACTIVATE);
-        }
+
 
         #region Window Initialization
 
@@ -206,12 +169,7 @@ namespace Ink_Canvas {
             };
         }
 
-        protected override void OnSourceInitialized(EventArgs e)
-        {
-            base.OnSourceInitialized(e);
-            // 设置窗口为无焦点且置顶（不会抢占焦点且始终在最前）
-            SetTopmostWithNoActivate(true);
-        }
+
 
         #endregion