fixed #319

src/Shared/HandyControl_Shared/Tools/Interop/InteropMethods.cs

@@ -244,6 +244,11 @@ namespace HandyControl.Tools.Interop
         [DllImport(InteropValues.ExternDll.User32, CharSet = CharSet.Unicode, SetLastError = true, BestFitMapping = false)]
         internal static extern short RegisterClass(InteropValues.WNDCLASS wc);
 
+        [SecurityCritical]
+        [SuppressUnmanagedCodeSecurity]
+        [DllImport(InteropValues.ExternDll.User32, CharSet = CharSet.Unicode, SetLastError = true, BestFitMapping = false)]
+        internal static extern short RegisterClass(InteropValues.WNDCLASS4ICON wc);
+
         [DllImport(InteropValues.ExternDll.User32, CharSet = CharSet.Auto)]
         internal static extern IntPtr DefWindowProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
 

src/Shared/HandyControl_Shared/Tools/Interop/InteropValues.cs

@@ -579,6 +579,21 @@ namespace HandyControl.Tools.Interop
             public string lpszClassName;
         }
 
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
+        internal class WNDCLASS4ICON
+        {
+            public int style;
+            public WndProc lpfnWndProc;
+            public int cbClsExtra;
+            public int cbWndExtra;
+            public IntPtr hInstance;
+            public IntPtr hIcon;
+            public IntPtr hCursor;
+            public IntPtr hbrBackground;
+            public string lpszMenuName;
+            public string lpszClassName;
+        }
+
         [StructLayout(LayoutKind.Sequential, Pack = 2)]
         internal struct BITMAPINFO
         {