Fix COMException 0xD0000701 in PowerToys Run when resuming from sleep

src/common/ManagedCommon/NativeMethods.cs

@@ -112,5 +112,31 @@ namespace ManagedCommon
             public int cyTopHeight;
             public int cyBottomHeight;
         }
+
+        /// <summary>
+        /// Safely calls DwmExtendFrameIntoClientArea to handle potential COMExceptions
+        /// that can occur after resuming from sleep state.
+        /// </summary>
+        /// <param name="hWnd">Window handle</param>
+        /// <param name="pMarInset">Margins</param>
+        /// <returns>IntPtr.Zero on success, error code otherwise</returns>
+        internal static IntPtr SafeDwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset)
+        {
+            try
+            {
+                return DwmExtendFrameIntoClientArea(hWnd, ref pMarInset);
+            }
+            catch (COMException ex) when (ex.HResult == unchecked((int)0xD0000701))
+            {
+                // Return a default value when this specific DWM error occurs (typically after sleep/resume)
+                // This is a non-critical styling error and can be safely ignored
+                return new IntPtr(-1); // Indicator for this specific error
+            }
+            catch (Exception)
+            {
+                // For other exceptions, rethrow to be handled by caller
+                throw;
+            }
+        }
     }
 }

src/common/ManagedCommon/WindowHelpers.cs

@@ -47,7 +47,9 @@ namespace ManagedCommon
             if (OSVersionHelper.IsWindows10())
             {
                 var margins = new NativeMethods.MARGINS { cxLeftWidth = 0, cxRightWidth = 0, cyBottomHeight = 0, cyTopHeight = 2 };
-                NativeMethods.DwmExtendFrameIntoClientArea(handle, ref margins);
+
+                // Use the safe version of DwmExtendFrameIntoClientArea that handles resume-from-sleep issues
+                NativeMethods.SafeDwmExtendFrameIntoClientArea(handle, ref margins);
             }
         }
     }

src/modules/launcher/PowerLauncher/MainWindow.xaml.cs

@@ -195,17 +195,37 @@ namespace PowerLauncher
             _viewModel.RegisterHotkey(_hwndSource.Handle);
             if (OSVersionHelper.IsGreaterThanWindows11_21H2())
             {
-                // ResizeMode="NoResize" removes rounded corners. So force them to rounded.
-                IntPtr hWnd = new WindowInteropHelper(GetWindow(this)).EnsureHandle();
-                DWMWINDOWATTRIBUTE attribute = DWMWINDOWATTRIBUTE.DWMWA_WINDOW_CORNER_PREFERENCE;
-                DWM_WINDOW_CORNER_PREFERENCE preference = DWM_WINDOW_CORNER_PREFERENCE.DWMWCP_ROUND;
-                DwmSetWindowAttribute(hWnd, attribute, ref preference, sizeof(uint));
+                try
+                {
+                    // ResizeMode="NoResize" removes rounded corners. So force them to rounded.
+                    IntPtr hWnd = new WindowInteropHelper(GetWindow(this)).EnsureHandle();
+                    DWMWINDOWATTRIBUTE attribute = DWMWINDOWATTRIBUTE.DWMWA_WINDOW_CORNER_PREFERENCE;
+                    DWM_WINDOW_CORNER_PREFERENCE preference = DWM_WINDOW_CORNER_PREFERENCE.DWMWCP_ROUND;
+                    DwmSetWindowAttribute(hWnd, attribute, ref preference, sizeof(uint));
+                }
+                catch (COMException ex) when (ex.HResult == unchecked((int)0xD0000701))
+                {
+                    // Ignore this specific DWM error which can occur after resuming from sleep
+                    // This error is related to window styling and doesn't affect functionality
+                    Log.Exception("DWM styling error occurred (typically after sleep resume). This is non-critical.", ex, GetType());
+
+                    // Fallback to non-rounded corners
+                    MainBorder.BorderThickness = new Thickness(0.5);
+                }
+                catch (Exception ex)
+                {
+                    // Log other errors but continue execution
+                    Log.Exception("Error setting DWM window attributes", ex, GetType());
+
+                    // Fallback to non-rounded corners
+                    MainBorder.BorderThickness = new Thickness(0.5);
+                }
             }
             else
             {
                 // On Windows10 ResizeMode="NoResize" removes the border so we add a new one.
                 // Also on 22000 it crashes due to DWMWA_WINDOW_CORNER_PREFERENCE https://github.com/microsoft/PowerToys/issues/36558
-                MainBorder.BorderThickness = new System.Windows.Thickness(0.5);
+                MainBorder.BorderThickness = new Thickness(0.5);
             }
         }