From e3d20382d4702cd16252a76b1285b7d267e1eef3 Mon Sep 17 00:00:00 2001
From: NaBian <836904362@qq.com>
Date: Sat, 18 Jan 2020 16:55:45 +0800
Subject: [PATCH] delete redundant codes

---
 .../Themes/Styles/Window.xaml                 |  10 +-
 .../Themes/Styles/Window.xaml                 |  10 +-
 .../Themes/Styles/Window.xaml                 |  10 +-
 .../Window/GlowWindow.xaml                    |  10 +-
 .../Controls/Window/GlowWindow.cs             | 455 +++++-------------
 .../Controls/Window/Window.cs                 |   6 +-
 .../Tools/Interop/InteropMethods.cs           |  86 +---
 .../Tools/Interop/InteropValues.cs            | 114 +----
 8 files changed, 160 insertions(+), 541 deletions(-)

diff --git a/src/Core_30/HandyControl_Core_30/Themes/Styles/Window.xaml b/src/Core_30/HandyControl_Core_30/Themes/Styles/Window.xaml
index 823319e4..15e08920 100644
--- a/src/Core_30/HandyControl_Core_30/Themes/Styles/Window.xaml
+++ b/src/Core_30/HandyControl_Core_30/Themes/Styles/Window.xaml
@@ -48,7 +48,7 @@
     </Style>
 
     <Style TargetType="Window">
-        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="UseLayoutRounding" Value="True"/>
     </Style>
@@ -56,7 +56,7 @@
     <Style x:Key="WindowWin10" TargetType="controls:Window">
         <Setter Property="BorderThickness" Value="1"/>
         <Setter Property="BorderBrush" Value="#262e2f"/>
-        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="UseLayoutRounding" Value="True"/>
         <Setter Property="NonClientAreaBackground" Value="{DynamicResource RegionBrush}"/>
@@ -178,6 +178,12 @@
         <Setter Property="Background" Value="Transparent"/>
     </Style>
 
+    <Style x:Key="WindowGlow" BasedOn="{StaticResource WindowWin10}" TargetType="controls:GlowWindow">
+        <Setter Property="ActiveGlowColor" Value="#262e2f"/>
+        <Setter Property="InactiveGlowColor" Value="{DynamicResource BorderColor}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+    </Style>
+
     <Style TargetType="controls:ImageBrowser">
         <Setter Property="Background" Value="Transparent"/>
         <Setter Property="MinWidth" Value="400"/>
diff --git a/src/Net_40/HandyControl_Net_40/Themes/Styles/Window.xaml b/src/Net_40/HandyControl_Net_40/Themes/Styles/Window.xaml
index e4a662a5..b0203625 100644
--- a/src/Net_40/HandyControl_Net_40/Themes/Styles/Window.xaml
+++ b/src/Net_40/HandyControl_Net_40/Themes/Styles/Window.xaml
@@ -49,7 +49,7 @@
     </Style>
 
     <Style TargetType="Window">
-        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="UseLayoutRounding" Value="True"/>
     </Style>
@@ -57,7 +57,7 @@
     <Style x:Key="WindowWin10" BasedOn="{x:Null}" TargetType="controls:Window">
         <Setter Property="BorderThickness" Value="1"/>
         <Setter Property="BorderBrush" Value="#262e2f"/>
-        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="UseLayoutRounding" Value="True"/>
         <Setter Property="NonClientAreaBackground" Value="{DynamicResource RegionBrush}"/>
@@ -179,8 +179,10 @@
         <Setter Property="Background" Value="Transparent"/>
     </Style>
 
-    <Style x:Key="WindowGlow">
-
+    <Style x:Key="WindowGlow" BasedOn="{StaticResource WindowWin10}" TargetType="controls:GlowWindow">
+        <Setter Property="ActiveGlowColor" Value="#262e2f"/>
+        <Setter Property="InactiveGlowColor" Value="{DynamicResource BorderColor}"/>
+        <Setter Property="BorderThickness" Value="0"/>
     </Style>
 
     <Style TargetType="controls:ImageBrowser">
diff --git a/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Window.xaml b/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Window.xaml
index 0d7b070b..84b09e51 100644
--- a/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Window.xaml
+++ b/src/Net_GE45/HandyControl_Net_GE45/Themes/Styles/Window.xaml
@@ -48,7 +48,7 @@
     </Style>
 
     <Style TargetType="Window">
-        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="UseLayoutRounding" Value="True"/>
     </Style>
@@ -56,7 +56,7 @@
     <Style x:Key="WindowWin10" TargetType="controls:Window">
         <Setter Property="BorderThickness" Value="1"/>
         <Setter Property="BorderBrush" Value="#262e2f"/>
-        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="UseLayoutRounding" Value="True"/>
         <Setter Property="NonClientAreaBackground" Value="{DynamicResource RegionBrush}"/>
@@ -178,6 +178,12 @@
         <Setter Property="Background" Value="Transparent"/>
     </Style>
 
+    <Style x:Key="WindowGlow" BasedOn="{StaticResource WindowWin10}" TargetType="controls:GlowWindow">
+        <Setter Property="ActiveGlowColor" Value="#262e2f"/>
+        <Setter Property="InactiveGlowColor" Value="{DynamicResource BorderColor}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+    </Style>
+
     <Style TargetType="controls:ImageBrowser">
         <Setter Property="Background" Value="Transparent"/>
         <Setter Property="MinWidth" Value="400"/>
diff --git a/src/Shared/HandyControlDemo_Shared/Window/GlowWindow.xaml b/src/Shared/HandyControlDemo_Shared/Window/GlowWindow.xaml
index 34a7945a..b1bc5e52 100644
--- a/src/Shared/HandyControlDemo_Shared/Window/GlowWindow.xaml
+++ b/src/Shared/HandyControlDemo_Shared/Window/GlowWindow.xaml
@@ -1,4 +1,4 @@
-<Window x:Class="HandyControlDemo.Window.GlowWindow"
+<hc:GlowWindow x:Class="HandyControlDemo.Window.GlowWindow"
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
@@ -6,12 +6,12 @@
                xmlns:hc="https://handyorg.github.io/handycontrol"
                xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
                mc:Ignorable="d"
+               Background="{DynamicResource MainContentBackgroundBrush}"
                WindowStartupLocation="CenterScreen"
                Title="{x:Static langs:Lang.Title}"
+               ActiveGlowColor="{DynamicResource PrimaryColor}"
                Height="450" 
                Width="800" 
                Icon="/HandyControlDemo;component/Resources/Img/icon.ico">
-    <Grid>
-        
-    </Grid>
-</Window>
+    <Border Background="{DynamicResource MainContentForegroundDrawingBrush}"/>
+</hc:GlowWindow>
diff --git a/src/Shared/HandyControl_Shared/Controls/Window/GlowWindow.cs b/src/Shared/HandyControl_Shared/Controls/Window/GlowWindow.cs
index eda2faef..19bcd7c3 100644
--- a/src/Shared/HandyControl_Shared/Controls/Window/GlowWindow.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Window/GlowWindow.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Windows;
@@ -11,17 +10,14 @@ using System.Windows.Threading;
 using HandyControl.Data;
 using HandyControl.Expression.Drawing;
 using HandyControl.Tools;
-using HandyControl.Tools.Extension;
 using HandyControl.Tools.Interop;
 
 namespace HandyControl.Controls
 {
-    public class GlowWindow : System.Windows.Window
+    public class GlowWindow : Window
     {
         internal int DeferGlowChangesCount;
 
-        private IntPtr _ownerForActivate;
-
         private readonly GlowEdge[] _glowEdges = new GlowEdge[4];
 
         private DispatcherTimer _makeGlowVisibleTimer;
@@ -30,12 +26,8 @@ namespace HandyControl.Controls
 
         private bool _useLogicalSizeForRestore;
 
-        private bool _isNonClientStripVisible;
-
         private bool _updatingZOrder;
 
-        private int _lastWindowPlacement;
-
         private Rect _logicalSizeForRestore = Rect.Empty;
 
         public static readonly DependencyProperty ActiveGlowColorProperty = DependencyProperty.Register(
@@ -62,36 +54,16 @@ namespace HandyControl.Controls
             ResizeModeProperty.OverrideMetadata(typeof(GlowWindow), new FrameworkPropertyMetadata(OnResizeModeChanged));
         }
 
-        public void ChangeOwnerForActivate(IntPtr newOwner)
+        #region internal
+
+        internal void EndDeferGlowChanges()
         {
-            _ownerForActivate = newOwner;
+            foreach (var current in LoadedGlowWindows) current.CommitChanges();
         }
 
-        public void ChangeOwner(IntPtr newOwner)
-        {
-            var _ = new WindowInteropHelper(this)
-            {
-                Owner = newOwner
-            };
-            foreach (var current in LoadedGlowWindows) current.ChangeOwner(newOwner);
-            UpdateZOrderOfThisAndOwner();
-        }
+        #endregion
 
-        private static int PressedMouseButtons
-        {
-            get
-            {
-                var num = 0;
-                if (InteropMethods.IsKeyPressed(1)) num |= 1;
-                if (InteropMethods.IsKeyPressed(2)) num |= 2;
-                if (InteropMethods.IsKeyPressed(4)) num |= 16;
-                if (InteropMethods.IsKeyPressed(5)) num |= 32;
-                if (InteropMethods.IsKeyPressed(6)) num |= 64;
-                return num;
-            }
-        }
-
-        private IEnumerable<GlowEdge> LoadedGlowWindows => from w in _glowEdges where w != null select w;
+        #region protected
 
         protected virtual bool ShouldShowGlow
         {
@@ -103,6 +75,114 @@ namespace HandyControl.Controls
             }
         }
 
+        protected virtual IntPtr HwndSourceHook(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
+        {
+            if (msg <= 71)
+            {
+                if (msg == 6)
+                {
+                    return IntPtr.Zero;
+                }
+
+                if (msg != 12)
+                {
+                    switch (msg)
+                    {
+                        case 70:
+                            WmWindowPosChanging(lParam);
+                            return IntPtr.Zero;
+                        case 71:
+                            WmWindowPosChanged(lParam);
+                            return IntPtr.Zero;
+                        default:
+                            return IntPtr.Zero;
+                    }
+                }
+            }
+            else
+            {
+                if (msg <= 166)
+                {
+                    switch (msg)
+                    {
+                        case 128:
+                            break;
+                        case 129:
+                        case 130:
+                            return IntPtr.Zero;
+                        case 134:
+                            handled = true;
+                            return WmNcActivate(hWnd, wParam);
+                        default:
+                            switch (msg)
+                            {
+                                case 164:
+                                case 165:
+                                case 166:
+                                    handled = true;
+                                    return IntPtr.Zero;
+                                default:
+                                    return IntPtr.Zero;
+                            }
+                    }
+                }
+                else
+                {
+                    switch (msg)
+                    {
+                        case 174:
+                        case 175:
+                            handled = true;
+                            return IntPtr.Zero;
+                        default:
+                            if (msg != 274) return IntPtr.Zero;
+                            WmSysCommand(hWnd, wParam);
+                            return IntPtr.Zero;
+                    }
+                }
+            }
+
+            handled = true;
+            return CallDefWindowProcWithoutVisibleStyle(hWnd, msg, wParam, lParam);
+        }
+
+        protected override void OnActivated(EventArgs e)
+        {
+            UpdateGlowActiveState();
+            base.OnActivated(e);
+        }
+
+        protected override void OnDeactivated(EventArgs e)
+        {
+            UpdateGlowActiveState();
+            base.OnDeactivated(e);
+        }
+
+        protected override void OnClosed(EventArgs e)
+        {
+            StopTimer();
+            DestroyGlowWindows();
+            base.OnClosed(e);
+        }
+
+        protected override void OnSourceInitialized(EventArgs e)
+        {
+            var hwndSource = HwndSource.FromHwnd(new WindowInteropHelper(this).Handle);
+            if (hwndSource != null)
+            {
+                hwndSource.AddHook(HwndSourceHook);
+                CreateGlowWindowHandles();
+            }
+
+            base.OnSourceInitialized(e);
+        }
+
+        #endregion
+
+        #region private
+
+        private IEnumerable<GlowEdge> LoadedGlowWindows => from w in _glowEdges where w != null select w;
+
         private bool IsGlowVisible
         {
             get => _isGlowVisible;
@@ -135,10 +215,7 @@ namespace HandyControl.Controls
             customChromeWindow.UpdateGlowVisibility(false);
         }
 
-        private static void OnGlowColorChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
-        {
-            ((GlowWindow)obj).UpdateGlowColors();
-        }
+        private static void OnGlowColorChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args) => ((GlowWindow)obj).UpdateGlowColors();
 
         private void UpdateGlowColors()
         {
@@ -208,11 +285,6 @@ namespace HandyControl.Controls
 
         private IDisposable DeferGlowChanges() => new ChangeScope(this);
 
-        internal void EndDeferGlowChanges()
-        {
-            foreach (var current in LoadedGlowWindows) current.CommitChanges();
-        }
-
         private void UpdateGlowActiveState()
         {
             using (DeferGlowChanges())
@@ -235,13 +307,7 @@ namespace HandyControl.Controls
             }
         }
 
-        private void WmActivate(IntPtr wParam, IntPtr lParam)
-        {
-            if (_ownerForActivate != IntPtr.Zero)
-                InteropMethods.SendMessage(_ownerForActivate, InteropMethods.NOTIFYOWNERACTIVATE, wParam, lParam);
-        }
-
-        private void WmWindowPosChanging(IntPtr hwnd, IntPtr lParam)
+        private void WmWindowPosChanging(IntPtr lParam)
         {
             var windowpos = (InteropValues.WINDOWPOS)Marshal.PtrToStructure(lParam, typeof(InteropValues.WINDOWPOS));
             if ((windowpos.flags & 2u) == 0u && (windowpos.flags & 1u) == 0u && windowpos.cx > 0 && windowpos.cy > 0)
@@ -263,72 +329,6 @@ namespace HandyControl.Controls
             }
         }
 
-        private static InteropValues.RECT GetClientRectRelativeToWindowRect(IntPtr hWnd)
-        {
-            InteropMethods.GetWindowRect(hWnd, out var rect);
-            InteropMethods.GetClientRect(hWnd, out var result);
-            var point = new InteropValues.POINT
-            {
-                X = 0,
-                Y = 0
-            };
-            InteropMethods.ClientToScreen(hWnd, ref point);
-            result.Offset(point.X - rect.Left, point.Y - rect.Top);
-            return result;
-        }
-
-        private void UpdateMaximizedClipRegion(IntPtr hWnd)
-        {
-            var clientRectRelativeToWindowRect = GetClientRectRelativeToWindowRect(hWnd);
-            if (_isNonClientStripVisible) clientRectRelativeToWindowRect.Bottom++;
-
-            var hRgn = InteropMethods.CreateRectRgnIndirect(ref clientRectRelativeToWindowRect);
-            InteropMethods.SetWindowRgn(hWnd, hRgn, InteropMethods.IsWindowVisible(hWnd));
-        }
-
-        private IntPtr ComputeRoundRectRegion(int left, int top, int width, int height, int cornerRadius)
-        {
-            var nWidthEllipse = (int)(2 * cornerRadius * DpiHelper.LogicalToDeviceUnitsScalingFactorX);
-            var nHeightEllipse = (int)(2 * cornerRadius * DpiHelper.LogicalToDeviceUnitsScalingFactorY);
-            return InteropMethods.CreateRoundRectRgn(left, top, left + width + 1, top + height + 1, nWidthEllipse,
-                nHeightEllipse);
-        }
-
-        protected void SetRoundRect(IntPtr hWnd, int width, int height)
-        {
-            var hRgn = ComputeRoundRectRegion(0, 0, width, height, 0);
-            InteropMethods.SetWindowRgn(hWnd, hRgn, InteropMethods.IsWindowVisible(hWnd));
-        }
-
-        protected virtual bool UpdateClipRegionCore(IntPtr hWnd, int showCmd, ClipRegionChangeType changeType, Int32Rect currentBounds)
-        {
-            if (showCmd == 3)
-            {
-                UpdateMaximizedClipRegion(hWnd);
-                return true;
-            }
-
-            if (changeType == ClipRegionChangeType.FromSize || changeType == ClipRegionChangeType.FromPropertyChange ||
-                _lastWindowPlacement != showCmd)
-            {
-                SetRoundRect(hWnd, currentBounds.Width, currentBounds.Height);
-                return true;
-            }
-
-            return false;
-        }
-
-        private void UpdateClipRegion(IntPtr hWnd, InteropValues.WINDOWPLACEMENT placement, ClipRegionChangeType changeType,
-            InteropValues.RECT currentBounds)
-        {
-            UpdateClipRegionCore(hWnd, placement.showCmd, changeType, currentBounds.ToInt32Rect());
-            _lastWindowPlacement = placement.showCmd;
-        }
-
-        protected virtual void OnWindowPosChanged(IntPtr hWnd, int showCmd, Int32Rect rcNormalPosition)
-        {
-        }
-
         private void UpdateZOrderOfOwner(IntPtr hwndOwner)
         {
             var lastOwnedWindow = IntPtr.Zero;
@@ -366,34 +366,22 @@ namespace HandyControl.Controls
             }
         }
 
-        private void WmWindowPosChanged(IntPtr hWnd, IntPtr lParam)
+        private void WmWindowPosChanged(IntPtr lParam)
         {
             try
             {
                 var windowpos = (InteropValues.WINDOWPOS)Marshal.PtrToStructure(lParam, typeof(InteropValues.WINDOWPOS));
-                var windowPlacement = InteropMethods.GetWindowPlacement(hWnd);
-                var currentBounds = new InteropValues.RECT(windowpos.x, windowpos.y, windowpos.x + windowpos.cx,
-                    windowpos.y + windowpos.cy);
-                if ((windowpos.flags & 1u) != 1u)
-                {
-                    UpdateClipRegion(hWnd, windowPlacement, ClipRegionChangeType.FromSize, currentBounds);
-                }
-                else
-                {
-                    if ((windowpos.flags & 2u) != 2u)
-                        UpdateClipRegion(hWnd, windowPlacement, ClipRegionChangeType.FromPosition, currentBounds);
-                }
 
-                OnWindowPosChanged(hWnd, windowPlacement.showCmd, windowPlacement.rcNormalPosition.ToInt32Rect());
                 UpdateGlowWindowPositions((windowpos.flags & 64u) == 0u);
                 UpdateZOrderOfThisAndOwner();
             }
-            catch (Win32Exception)
+            catch
             {
+                // ignored
             }
         }
 
-        internal Rect GetOnScreenPosition(Rect floatRect)
+        private Rect GetOnScreenPosition(Rect floatRect)
         {
             var result = floatRect;
             floatRect = floatRect.LogicalToDeviceUnits();
@@ -422,90 +410,7 @@ namespace HandyControl.Controls
             return result;
         }
 
-        private InteropValues.WINDOWINFO GetWindowInfo(IntPtr hWnd)
-        {
-            var windowInfo = default(InteropValues.WINDOWINFO);
-            windowInfo.cbSize = Marshal.SizeOf(windowInfo);
-            InteropMethods.GetWindowInfo(hWnd, ref windowInfo);
-            return windowInfo;
-        }
-
-        private IntPtr WmNcCalcSize(IntPtr hWnd, IntPtr wParam, IntPtr lParam, ref bool handled)
-        {
-            _isNonClientStripVisible = false;
-            var windowPlacement = InteropMethods.GetWindowPlacement(hWnd);
-            var flag = windowPlacement.showCmd == 3;
-            if (flag)
-            {
-                var rect = (InteropValues.RECT)Marshal.PtrToStructure(lParam, typeof(InteropValues.RECT));
-                InteropMethods.DefWindowProc(hWnd, 131, wParam, lParam);
-                var rect2 = (InteropValues.RECT)Marshal.PtrToStructure(lParam, typeof(InteropValues.RECT));
-                var monitorinfo = MonitorInfoFromWindow(hWnd);
-                if (monitorinfo.rcMonitor.Height == monitorinfo.rcWork.Height &&
-                    monitorinfo.rcMonitor.Width == monitorinfo.rcWork.Width)
-                {
-                    _isNonClientStripVisible = true;
-                    rect2.Bottom--;
-                }
-
-                rect2.Top = rect.Top + (int)GetWindowInfo(hWnd).cyWindowBorders;
-                Marshal.StructureToPtr(rect2, lParam, true);
-            }
-
-            handled = true;
-            return IntPtr.Zero;
-        }
-
-        private IntPtr WmNcHitTest(IntPtr hWnd, IntPtr lParam, ref bool handled)
-        {
-            if (PresentationSource.FromDependencyObject(this) == null) return new IntPtr(0);
-
-            var point = new Point(InteropMethods.GetXLParam(lParam.ToInt32()),
-                InteropMethods.GetYLParam(lParam.ToInt32()));
-            var point2 = PointFromScreen(point);
-            DependencyObject visualHit = null;
-            VisualHelper.HitTestVisibleElements(this, delegate (HitTestResult target)
-            {
-                visualHit = target.VisualHit;
-                return HitTestResultBehavior.Stop;
-            }, new PointHitTestParameters(point2));
-
-            var num = 0;
-            while (visualHit != null)
-            {
-                //var nonClientArea = visualHit as INonClientArea;
-                //if (nonClientArea != null)
-                //{
-                //    num = nonClientArea.HitTest(point);
-                //    if (num != 0) break;
-                //}
-
-                visualHit = visualHit.GetVisualOrLogicalParent();
-            }
-
-            if (num == 0) num = 1;
-            handled = true;
-            return new IntPtr(num);
-        }
-
-        private IntPtr WmNcActivate(IntPtr hWnd, IntPtr wParam, IntPtr lParam, ref bool handled)
-        {
-            handled = true;
-            return InteropMethods.DefWindowProc(hWnd, 134, wParam, InteropMethods.HRGN_NONE);
-        }
-
-        private static void RaiseNonClientMouseMessageAsClient(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam)
-        {
-            var point = new InteropValues.POINT
-            {
-                X = InteropMethods.GetXLParam(lParam.ToInt32()),
-                Y = InteropMethods.GetYLParam(lParam.ToInt32())
-            };
-
-            InteropMethods.ScreenToClient(hWnd, ref point);
-            InteropMethods.SendMessage(hWnd, msg + 513 - 161, new IntPtr(PressedMouseButtons),
-                InteropMethods.MakeParam(point.X, point.Y));
-        }
+        private IntPtr WmNcActivate(IntPtr hWnd, IntPtr wParam) => InteropMethods.DefWindowProc(hWnd, 134, wParam, InteropMethods.HRGN_NONE);
 
         private bool IsAeroSnappedToMonitor(IntPtr hWnd)
         {
@@ -515,7 +420,7 @@ namespace HandyControl.Controls
             return MathHelper.AreClose(monitorinfo.rcWork.Height, logicalRect.Height) && MathHelper.AreClose(monitorinfo.rcWork.Top, logicalRect.Top);
         }
 
-        private void WmSysCommand(IntPtr hWnd, IntPtr wParam, IntPtr lParam)
+        private void WmSysCommand(IntPtr hWnd, IntPtr wParam)
         {
             var num = InteropMethods.GET_SC_WPARAM(wParam);
             if (num == 61456)
@@ -537,130 +442,20 @@ namespace HandyControl.Controls
             }
         }
 
-        private IntPtr CallDefWindowProcWithoutVisibleStyle(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
+        private IntPtr CallDefWindowProcWithoutVisibleStyle(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam)
         {
             var flag = VisualHelper.ModifyStyle(hWnd, 268435456, 0);
             var result = InteropMethods.DefWindowProc(hWnd, msg, wParam, lParam);
             if (flag) VisualHelper.ModifyStyle(hWnd, 0, 268435456);
-            handled = true;
             return result;
         }
 
-        protected virtual IntPtr HwndSourceHook(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
-        {
-            if (msg <= 71)
-            {
-                if (msg == 6)
-                {
-                    WmActivate(wParam, lParam);
-                    goto IL_11C;
-                }
-
-                if (msg != 12)
-                    switch (msg)
-                    {
-                        case 70:
-                            WmWindowPosChanging(hWnd, lParam);
-                            goto IL_11C;
-                        case 71:
-                            WmWindowPosChanged(hWnd, lParam);
-                            goto IL_11C;
-                        default:
-                            goto IL_11C;
-                    }
-            }
-            else
-            {
-                if (msg <= 166)
-                    switch (msg)
-                    {
-                        case 128:
-                            break;
-                        case 129:
-                        case 130:
-                            goto IL_11C;
-                        case 131:
-                            return WmNcCalcSize(hWnd, wParam, lParam, ref handled);
-                        case 132:
-                            return WmNcHitTest(hWnd, lParam, ref handled);
-                        //case 133:
-                        //    return WmNcPaint(hWnd, wParam, lParam, ref handled);
-                        case 134:
-                            return WmNcActivate(hWnd, wParam, lParam, ref handled);
-                        default:
-                            switch (msg)
-                            {
-                                case 164:
-                                case 165:
-                                case 166:
-                                    RaiseNonClientMouseMessageAsClient(hWnd, msg, wParam, lParam);
-                                    handled = true;
-                                    goto IL_11C;
-                                default:
-                                    goto IL_11C;
-                            }
-                    }
-                else
-                    switch (msg)
-                    {
-                        case 174:
-                        case 175:
-                            handled = true;
-                            goto IL_11C;
-                        default:
-                            if (msg != 274) goto IL_11C;
-                            WmSysCommand(hWnd, wParam, lParam);
-                            goto IL_11C;
-                    }
-            }
-
-            return CallDefWindowProcWithoutVisibleStyle(hWnd, msg, wParam, lParam, ref handled);
-        IL_11C:
-            return IntPtr.Zero;
-        }
-
         private void CreateGlowWindowHandles()
         {
             for (var i = 0; i < _glowEdges.Length; i++) GetOrCreateGlowWindow(i).EnsureHandle();
         }
 
-        protected override void OnActivated(EventArgs e)
-        {
-            UpdateGlowActiveState();
-            base.OnActivated(e);
-        }
+        #endregion
 
-        protected override void OnDeactivated(EventArgs e)
-        {
-            UpdateGlowActiveState();
-            base.OnDeactivated(e);
-        }
-
-        protected override void OnClosed(EventArgs e)
-        {
-            StopTimer();
-            DestroyGlowWindows();
-            base.OnClosed(e);
-        }
-
-        protected override void OnSourceInitialized(EventArgs e)
-        {
-            var hwndSource = HwndSource.FromHwnd(new WindowInteropHelper(this).Handle);
-            if (hwndSource != null)
-            {
-                hwndSource.AddHook(HwndSourceHook);
-                CreateGlowWindowHandles();
-            }
-
-            base.OnSourceInitialized(e);
-        }
-
-        protected enum ClipRegionChangeType
-        {
-            FromSize,
-            FromPosition,
-            FromPropertyChange,
-            FromUndockSingleTab
-        }
     }
 }
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Controls/Window/Window.cs b/src/Shared/HandyControl_Shared/Controls/Window/Window.cs
index fecf17ba..5d190fb6 100644
--- a/src/Shared/HandyControl_Shared/Controls/Window/Window.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Window/Window.cs
@@ -63,7 +63,7 @@ namespace HandyControl.Controls
 
         public static readonly DependencyProperty NonClientAreaHeightProperty = DependencyProperty.Register(
             "NonClientAreaHeight", typeof(double), typeof(Window),
-            new PropertyMetadata(26.0));
+            new PropertyMetadata(22.0));
 
         public static readonly DependencyProperty ShowNonClientAreaProperty = DependencyProperty.Register(
             "ShowNonClientArea", typeof(bool), typeof(Window),
@@ -80,8 +80,6 @@ namespace HandyControl.Controls
 
         private Thickness _actualBorderThickness;
 
-        private UIElement _nonClientArea;
-
         private bool _showNonClientArea = true;
 
         private double _tempNonClientAreaHeight;
@@ -92,6 +90,8 @@ namespace HandyControl.Controls
 
         private ResizeMode _tempResizeMode;
 
+        private UIElement _nonClientArea;
+
         static Window()
         {
             StyleProperty.OverrideMetadata(typeof(Window), new FrameworkPropertyMetadata(Application.Current.FindResource(ResourceToken.WindowWin10)));
diff --git a/src/Shared/HandyControl_Shared/Tools/Interop/InteropMethods.cs b/src/Shared/HandyControl_Shared/Tools/Interop/InteropMethods.cs
index 361d0853..2af265bf 100644
--- a/src/Shared/HandyControl_Shared/Tools/Interop/InteropMethods.cs
+++ b/src/Shared/HandyControl_Shared/Tools/Interop/InteropMethods.cs
@@ -10,17 +10,12 @@ namespace HandyControl.Tools.Interop
 {
     internal class InteropMethods
     {
-        private static int vsmNotifyOwnerActivate;
-
-        public static readonly IntPtr HRGN_NONE = new IntPtr(-1);
+        internal static readonly IntPtr HRGN_NONE = new IntPtr(-1);
 
         [DllImport(InteropValues.ExternDll.User32, CharSet = CharSet.Auto)]
         [ResourceExposure(ResourceScope.None)]
         internal static extern int RegisterWindowMessage(string msg);
 
-        [DllImport(InteropValues.ExternDll.User32, SetLastError = true, CharSet = CharSet.Auto)]
-        internal static extern int MapWindowPoints(IntPtr hWndFrom, IntPtr hWndTo, ref InteropValues.RECT lpPoints, uint cPoints);
-
         [DllImport(InteropValues.ExternDll.Kernel32, SetLastError = true, CharSet = CharSet.Auto)]
         internal static extern bool ReadProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, out InteropValues.TBBUTTON lpBuffer,
             int dwSize, out int lpNumberOfBytesRead);
@@ -282,18 +277,6 @@ namespace HandyControl.Tools.Interop
         [DllImport(InteropValues.ExternDll.User32, CharSet = CharSet.Auto)]
         internal static extern IntPtr GetDC(IntPtr ptr);
 
-        internal static int NOTIFYOWNERACTIVATE
-        {
-            get
-            {
-                if (vsmNotifyOwnerActivate == 0)
-                {
-                    vsmNotifyOwnerActivate = RegisterWindowMessage("NOTIFYOWNERACTIVATE{A982313C-756C-4da9-8BD0-0C375A45784B}");
-                }
-                return vsmNotifyOwnerActivate;
-            }
-        }
-
         [DllImport(InteropValues.ExternDll.User32, SetLastError = true)]
         [return: MarshalAs(UnmanagedType.Bool)]
         private static extern bool GetWindowPlacement(IntPtr hwnd, InteropValues.WINDOWPLACEMENT lpwndpl);
@@ -307,23 +290,6 @@ namespace HandyControl.Tools.Interop
             }
             throw new Win32Exception(Marshal.GetLastWin32Error());
         }
-        
-        [DllImport(InteropValues.ExternDll.User32)]
-        internal static extern int GetSystemMetrics(int index);
-        
-        [DllImport(InteropValues.ExternDll.User32)]
-        internal static extern int TrackPopupMenuEx(IntPtr hmenu, uint fuFlags, int x, int y, IntPtr hwnd, IntPtr lptpm);
-        
-        [DllImport(InteropValues.ExternDll.User32)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool EnableMenuItem(IntPtr menu, uint uIDEnableItem, uint uEnable);
-        
-        [DllImport(InteropValues.ExternDll.User32)]
-        internal static extern short GetKeyState(int vKey);
-        
-        internal static bool IsKeyPressed(int vKey) => GetKeyState(vKey) < 0;
-
-        internal static IntPtr MakeParam(int lowWord, int highWord) => new IntPtr((lowWord & 65535) | highWord << 16);
 
         internal static int GetXLParam(int lParam) => LoWord(lParam);
 
@@ -332,29 +298,14 @@ namespace HandyControl.Tools.Interop
         internal static int HiWord(int value) => (short)(value >> 16);
 
         internal static int LoWord(int value) => (short)(value & 65535);
-
-        [DllImport(InteropValues.ExternDll.User32)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool ScreenToClient(IntPtr hWnd, ref InteropValues.POINT point);
         
         [DllImport(InteropValues.ExternDll.User32)]
         internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
         
-        [DllImport(InteropValues.ExternDll.User32)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool ClientToScreen(IntPtr hWnd, ref InteropValues.POINT point);
-        
         [DllImport(InteropValues.ExternDll.User32)]
         [return: MarshalAs(UnmanagedType.Bool)]
         internal static extern bool EnumThreadWindows(uint dwThreadId, InteropValues.EnumWindowsProc lpfn, IntPtr lParam);
         
-        [DllImport(InteropValues.ExternDll.User32, SetLastError = true)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool PostMessage(IntPtr hWnd, int nMsg, IntPtr wParam, IntPtr lParam);
-
-        [DllImport(InteropValues.ExternDll.User32)]
-        internal static extern IntPtr GetDCEx(IntPtr hWnd, IntPtr hrgnClip, int dwFlags);
-        
         [DllImport(InteropValues.ExternDll.Gdi32)]
         [return: MarshalAs(UnmanagedType.Bool)]
         internal static extern bool DeleteDC(IntPtr hdc);
@@ -364,24 +315,6 @@ namespace HandyControl.Tools.Interop
 
         [DllImport(InteropValues.ExternDll.Gdi32, ExactSpelling = true, SetLastError = true)]
         internal static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj);
-        
-        [DllImport(InteropValues.ExternDll.Gdi32, CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
-        internal static extern IntPtr CreateRoundRectRgn(int nLeftRect, int nTopRect, int nRightRect, int nBottomRect, int nWidthEllipse, int nHeightEllipse);
-        
-        [DllImport(InteropValues.ExternDll.Gdi32, CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
-        internal static extern IntPtr CreateRectRgn(int nLeftRect, int nTopRect, int nRightRect, int nBottomRect);
-        
-        [DllImport(InteropValues.ExternDll.Gdi32, CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
-        internal static extern IntPtr CreateRectRgnIndirect(ref InteropValues.RECT lprc);
-        
-        [DllImport(InteropValues.ExternDll.Gdi32, CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
-        private static extern int CombineRgn(IntPtr hrngDest, IntPtr hrgnSrc1, IntPtr hrgnSrc2, int fnCombineMode);
-
-        internal static int CombineRgn(IntPtr hrnDest, IntPtr hrgnSrc1, IntPtr hrgnSrc2,
-            InteropValues.CombineMode combineMode) => CombineRgn(hrnDest, hrgnSrc1, hrgnSrc2, (int) combineMode);
-
-        [DllImport(InteropValues.ExternDll.User32, CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
-        internal static extern int SetWindowRgn(IntPtr hWnd, IntPtr hRgn, [MarshalAs(UnmanagedType.Bool)] bool redraw);
 
         [DllImport(InteropValues.ExternDll.User32, CharSet = CharSet.Unicode, SetLastError = true)]
         internal static extern IntPtr SendMessage(IntPtr hWnd, int nMsg, IntPtr wParam, IntPtr lParam);
@@ -391,10 +324,6 @@ namespace HandyControl.Tools.Interop
         
         [DllImport(InteropValues.ExternDll.User32)]
         internal static extern IntPtr GetWindow(IntPtr hwnd, int nCmd);
-        
-        [DllImport(InteropValues.ExternDll.User32)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool GetWindowInfo(IntPtr hwnd, ref InteropValues.WINDOWINFO pwi);
 
         [DllImport(InteropValues.ExternDll.User32)]
         [return: MarshalAs(UnmanagedType.Bool)]
@@ -427,10 +356,6 @@ namespace HandyControl.Tools.Interop
         private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
 
         internal static int GetWindowLong(IntPtr hWnd, InteropValues.GWL nIndex) => GetWindowLong(hWnd, (int)nIndex);
-        
-        [DllImport(InteropValues.ExternDll.User32)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool GetClientRect(IntPtr hwnd, out InteropValues.RECT lpRect);
 
         internal static IntPtr SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong)
         {
@@ -473,9 +398,6 @@ namespace HandyControl.Tools.Interop
         [DllImport(InteropValues.ExternDll.User32, CharSet = CharSet.Unicode, SetLastError = true)]
         internal static extern IntPtr CreateWindowEx(int dwExStyle, IntPtr classAtom, string lpWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, IntPtr hMenu, IntPtr hInstance, IntPtr lpParam);
 
-        [DllImport(InteropValues.ExternDll.Gdi32)]
-        internal static extern IntPtr CreateSolidBrush(int colorref);
-
         [DllImport(InteropValues.ExternDll.User32)]
         [return: MarshalAs(UnmanagedType.Bool)]
         internal static extern bool DestroyWindow(IntPtr hwnd);
@@ -490,11 +412,7 @@ namespace HandyControl.Tools.Interop
         
         [DllImport(InteropValues.ExternDll.User32)]
         internal static extern bool RedrawWindow(IntPtr hWnd, IntPtr lprcUpdate, IntPtr hrgnUpdate, InteropValues.RedrawWindowFlags flags);
-        
-        [DllImport(InteropValues.ExternDll.User32)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool FillRect(IntPtr hDC, ref InteropValues.RECT rect, IntPtr hbrush);
-        
+
         [DllImport(InteropValues.ExternDll.User32)]
         [return: MarshalAs(UnmanagedType.Bool)]
         internal static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr lprcClip, InteropValues.EnumMonitorsDelegate lpfnEnum, IntPtr dwData);
diff --git a/src/Shared/HandyControl_Shared/Tools/Interop/InteropValues.cs b/src/Shared/HandyControl_Shared/Tools/Interop/InteropValues.cs
index 0a605703..c183fb44 100644
--- a/src/Shared/HandyControl_Shared/Tools/Interop/InteropValues.cs
+++ b/src/Shared/HandyControl_Shared/Tools/Interop/InteropValues.cs
@@ -26,12 +26,7 @@ namespace HandyControl.Tools.Interop
 
         internal delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);
 
-        internal delegate IntPtr SubclassProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam, UIntPtr id, IntPtr refData);
-
-        internal delegate IntPtr WindowsHookProc(CbtHookAction code, IntPtr wParam, IntPtr lParam);
-
         internal const int
-            WS_CHILD = 0x40000000,
             BITSPIXEL = 12,
             PLANES = 14,
             BI_RGB = 0,
@@ -40,9 +35,6 @@ namespace HandyControl.Tools.Interop
             NIF_ICON = 0x00000002,
             NIF_TIP = 0x00000004,
             NIF_INFO = 0x00000010,
-            NIN_BALLOONSHOW = WM_USER + 2,
-            NIN_BALLOONHIDE = WM_USER + 3,
-            NIN_BALLOONTIMEOUT = WM_USER + 4,
             NIM_ADD = 0x00000000,
             NIM_MODIFY = 0x00000001,
             NIM_DELETE = 0x00000002,
@@ -50,22 +42,15 @@ namespace HandyControl.Tools.Interop
             NIIF_INFO = 0x00000001,
             NIIF_WARNING = 0x00000002,
             NIIF_ERROR = 0x00000003,
-            NIIF_LARGE_ICON = 0x00000020,
             WM_KEYDOWN = 0x0100,
             WM_KEYUP = 0x0101,
             WM_SYSKEYDOWN = 0x0104,
             WM_SYSKEYUP = 0x0105,
             WM_SYSCOMMAND = 0x112,
             WM_MOUSEMOVE = 0x0200,
-            WM_LBUTTONDOWN = 0x0201,
             WM_LBUTTONUP = 0x0202,
             WM_LBUTTONDBLCLK = 0x0203,
-            WM_RBUTTONDOWN = 0x0204,
             WM_RBUTTONUP = 0x0205,
-            WM_RBUTTONDBLCLK = 0x0206,
-            WM_MBUTTONDOWN = 0x0207,
-            WM_MBUTTONUP = 0x0208,
-            WM_MBUTTONDBLCLK = 0x0209,
             WM_CLIPBOARDUPDATE = 0x031D,
             WM_USER = 0x0400,
             MF_BYPOSITION = 0x400,
@@ -73,22 +58,10 @@ namespace HandyControl.Tools.Interop
             TB_GETBUTTON = WM_USER + 23,
             TB_BUTTONCOUNT = WM_USER + 24,
             TB_GETITEMRECT = WM_USER + 29,
-            STANDARD_RIGHTS_REQUIRED = 0x000F0000,
-            SYNCHRONIZE = 0x00100000,
-            PROCESS_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | 0xFFF,
-            MEM_COMMIT = 0x1000,
-            MEM_RELEASE = 0x8000,
-            PAGE_READWRITE = 0x04,
-            TBSTATE_HIDDEN = 0x08,
             VERTRES = 10,
-            HORZRES = 8,
             DESKTOPVERTRES = 117,
-            DESKTOPHORZRES = 118,
             LOGPIXELSX = 88,
-            LOGPIXELSY = 90,
-            CXFRAME = 32,
-            CXSIZEFRAME = CXFRAME,
-            SW_HIDE = 0;
+            LOGPIXELSY = 90;
 
         [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
         internal class NOTIFYICONDATA
@@ -220,14 +193,6 @@ namespace HandyControl.Tools.Interop
             public int Right;
             public int Bottom;
 
-            public RECT(int left, int top, int right, int bottom)
-            {
-                Left = left;
-                Top = top;
-                Right = right;
-                Bottom = bottom;
-            }
-
             public RECT(Rect rect)
             {
                 Left = (int)rect.Left;
@@ -250,16 +215,6 @@ namespace HandyControl.Tools.Interop
                 get => Right - Left;
                 set => Right = Left + value;
             }
-
-            public void Offset(int dx, int dy)
-            {
-                Left += dx;
-                Right += dx;
-                Top += dy;
-                Bottom += dy;
-            }
-
-            public Int32Rect ToInt32Rect() => new Int32Rect(Left, Top, Width, Height);
         }
 
         internal struct BLENDFUNCTION
@@ -269,11 +224,13 @@ namespace HandyControl.Tools.Interop
             public byte SourceConstantAlpha;
             public byte AlphaFormat;
         }
+
         internal enum GWL
         {
             STYLE = -16,
             EXSTYLE = -20
         }
+        
         internal enum GWLP
         {
             WNDPROC = -4,
@@ -282,26 +239,6 @@ namespace HandyControl.Tools.Interop
             USERDATA = -21,
             ID = -12
         }
-        internal enum CombineMode
-        {
-            RGN_AND = 1,
-            RGN_OR,
-            RGN_XOR,
-            RGN_DIFF,
-            RGN_COPY,
-            RGN_MIN = 1,
-            RGN_MAX = 5
-        }
-
-        [StructLayout(LayoutKind.Sequential)]
-        internal class BITMAPFILEHEADER
-        {
-            public ushort bfType;
-            public uint bfSize;
-            public ushort bfReserved1;
-            public ushort bfReserved2;
-            public uint bfOffBits;
-        }
 
         internal struct BITMAPINFOHEADER
         {
@@ -318,23 +255,6 @@ namespace HandyControl.Tools.Interop
             internal uint biClrImportant;
         }
 
-        internal struct PictDescBitmap
-        {
-            internal int cbSizeOfStruct;
-            internal int pictureType;
-            internal IntPtr hBitmap;
-            internal IntPtr hPalette;
-            internal int unused;
-            internal static PictDescBitmap Default =>
-                new PictDescBitmap
-                {
-                    cbSizeOfStruct = 20,
-                    pictureType = 1,
-                    hBitmap = IntPtr.Zero,
-                    hPalette = IntPtr.Zero
-                };
-        }
-
         [Flags]
         internal enum RedrawWindowFlags : uint
         {
@@ -352,20 +272,6 @@ namespace HandyControl.Tools.Interop
             NoFrame = 2048u
         }
 
-        internal enum CbtHookAction
-        {
-            HCBT_MOVESIZE,
-            HCBT_MINMAX,
-            HCBT_QS,
-            HCBT_CREATEWND,
-            HCBT_DESTROYWND,
-            HCBT_ACTIVATE,
-            HCBT_CLICKSKIPPED,
-            HCBT_KEYSKIPPED,
-            HCBT_SYSCOMMAND,
-            HCBT_SETFOCUS
-        }
-
         [StructLayout(LayoutKind.Sequential)]
         internal class WINDOWPOS
         {
@@ -389,20 +295,6 @@ namespace HandyControl.Tools.Interop
             public RECT rcNormalPosition;
         }
 
-        internal struct WINDOWINFO
-        {
-            public int cbSize;
-            public RECT rcWindow;
-            public RECT rcClient;
-            public int dwStyle;
-            public int dwExStyle;
-            public uint dwWindowStatus;
-            public uint cxWindowBorders;
-            public uint cyWindowBorders;
-            public ushort atomWindowType;
-            public ushort wCreatorVersion;
-        }
-
         [StructLayout(LayoutKind.Sequential, Pack = 4)]
         internal struct SIZE
         {