回答編集履歴

見直しキャンペーン中

2023/07/29 09:04

投稿

TN8001

スコア10111

answer CHANGED Viewed

@@ -1,4 +1,4 @@
-歴史的経緯により最小化・最大化は、`SetWindowLong`してください。
+（歴史的経緯により）最小化・最大化は、`SetWindowLong`してください。
 [How do I enable and disable the minimize, maximize, and close buttons in my caption bar? - The Old New Thing](https://devblogs.microsoft.com/oldnewthing/20100604-00/?p=13803)

見直しキャンペーン中

2023/07/29 09:03

投稿

TN8001

スコア10111

answer CHANGED Viewed

@@ -1,179 +1,174 @@
-歴史的経緯により最小化・最大化は、`SetWindowLong`してください。
-[How do I enable and disable the minimize, maximize, and close buttons in my caption bar? - The Old New Thing](https://devblogs.microsoft.com/oldnewthing/20100604-00/?p=13803)
-[WPF: Disabling or Hiding the Minimize, Maximize or Close Button Of a Window - TechNet Articles - United States (English) - TechNet Wiki](https://social.technet.microsoft.com/wiki/contents/articles/29183.wpf-disabling-or-hiding-the-minimize-maximize-or-close-button-of-a-window.aspx)
-~~コードも書いてみようと思ったんですが、ちゃんとやろうとすると時間がかかりそうなので取り急ぎ情報だけ^^;~~
----
-参考コードは最初からfalseだった時の手当てがないですね。
----
-個別設定できたほうが一般向けだろうと思うので３つに分けました（一括切り替えも用意しようかとも思いましたが、バインドするとなると煩雑なので省略）
-[NuGet Gallery | Microsoft.Windows.CsWin32 0.1.619-beta](https://www.nuget.org/packages/Microsoft.Windows.CsWin32/0.1.619-beta)
-[NuGet Gallery | Microsoft.Xaml.Behaviors.Wpf 1.1.39](https://www.nuget.org/packages/Microsoft.Xaml.Behaviors.Wpf/1.1.39)
-```xaml
-<Window
-  x:Class="Questions370772.MainWindow"
-  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-  xmlns:Behaviors="http://schemas.microsoft.com/xaml/behaviors"
-  xmlns:local="clr-namespace:Questions370772"
-  Width="800"
-  Height="450">
-  <Behaviors:Interaction.Behaviors>
-    <local:WindowButtonBehavior
-      CloseButtonEnabled="{Binding IsChecked, ElementName=close}"
-      MaximizeButtonEnabled="{Binding IsChecked, ElementName=maximize}"
-      MinimizeButtonEnabled="{Binding IsChecked, ElementName=minimize}" />
-  </Behaviors:Interaction.Behaviors>
-  <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
-    <CheckBox
-      x:Name="minimize"
-      VerticalContentAlignment="Center"
-      Content="最小化ボタンを有効にする" />
-    <CheckBox
-      x:Name="maximize"
-      VerticalContentAlignment="Center"
-      Content="最大化ボタンを有効にする" />
-    <CheckBox
-      x:Name="close"
-      VerticalContentAlignment="Center"
-      Content="閉じるボタンを有効にする" />
-  </StackPanel>
-</Window>
-```
-```C#
-using System;
-using System.Windows;
-using System.Windows.Interop;
-using Microsoft.Xaml.Behaviors;
-using Windows.Win32.Foundation;
-using static Windows.Win32.PInvoke;
-using static Windows.Win32.UI.WindowsAndMessaging.MENU_ITEM_FLAGS;
-using static Windows.Win32.UI.WindowsAndMessaging.WINDOW_LONG_PTR_INDEX;
-using static Windows.Win32.UI.WindowsAndMessaging.WINDOW_STYLE;
-namespace Questions370772
-{
-    public class WindowButtonBehavior : Behavior<Window>
-    {
-        public bool MinimizeButtonEnabled { get => (bool)GetValue(MinimizeButtonEnabledProperty); set => SetValue(MinimizeButtonEnabledProperty, value); }
-        public static readonly DependencyProperty MinimizeButtonEnabledProperty
-            = DependencyProperty.Register(nameof(MinimizeButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
-                new PropertyMetadata(true, new PropertyChangedCallback(OnMinimizeButtonEnabledChanged)));
-        private static void OnMinimizeButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-            => (d as WindowButtonBehavior)?.OnMinimizeButtonEnabledChanged();
-        public bool MaximizeButtonEnabled { get => (bool)GetValue(MaximizeButtonEnabledProperty); set => SetValue(MaximizeButtonEnabledProperty, value); }
-        public static readonly DependencyProperty MaximizeButtonEnabledProperty
-            = DependencyProperty.Register(nameof(MaximizeButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
-                new PropertyMetadata(true, new PropertyChangedCallback(OnMaximizeButtonEnabledChanged)));
-        private static void OnMaximizeButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-            => (d as WindowButtonBehavior)?.OnMaximizeButtonEnabledChanged();
-        public bool CloseButtonEnabled { get => (bool)GetValue(CloseButtonEnabledProperty); set => SetValue(CloseButtonEnabledProperty, value); }
-        public static readonly DependencyProperty CloseButtonEnabledProperty
-            = DependencyProperty.Register(nameof(CloseButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
-                new PropertyMetadata(true, new PropertyChangedCallback(OnCloseButtonEnabledChanged)));
-        private static void OnCloseButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-            => (d as WindowButtonBehavior)?.OnCloseButtonEnabledChanged();
-        private IntPtr hwnd;
-        protected override void OnAttached()
-            => AssociatedObject.SourceInitialized += AssociatedObject_SourceInitialized;
-        private void AssociatedObject_SourceInitialized(object? sender, EventArgs e)
-        {
-            AssociatedObject.SourceInitialized -= AssociatedObject_SourceInitialized;
-            hwnd = new WindowInteropHelper(AssociatedObject).Handle;
-            if (!MinimizeButtonEnabled) OnMinimizeButtonEnabledChanged();
-            if (!MaximizeButtonEnabled) OnMaximizeButtonEnabledChanged();
-            if (!CloseButtonEnabled) OnCloseButtonEnabledChanged();
-        }
-        private void OnMinimizeButtonEnabledChanged()
-        {
-            if (hwnd == IntPtr.Zero) return;
-            if (MinimizeButtonEnabled)
-            {
-                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) | (int)WS_MINIMIZEBOX);
-            }
-            else
-            {
-                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) & ~(int)WS_MINIMIZEBOX);
-                //if (AssociatedObject.WindowState == WindowState.Minimized)
-                //{
-                //    AssociatedObject.WindowState = WindowState.Normal;
-                //}
-            }
-        }
-        private void OnMaximizeButtonEnabledChanged()
-        {
-            if (hwnd == IntPtr.Zero) return;
-            if (MaximizeButtonEnabled)
-            {
-                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) | (int)WS_MAXIMIZEBOX);
-            }
-            else
-            {
-                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) & ~(int)WS_MAXIMIZEBOX);
-                //if (AssociatedObject.WindowState == WindowState.Maximized)
-                //{
-                //    AssociatedObject.WindowState = WindowState.Normal;
-                //}
-            }
-        }
-        private void OnCloseButtonEnabledChanged()
-        {
-            if (hwnd == IntPtr.Zero) return;
-            var hMenu = GetSystemMenu((HWND)hwnd, false);
-            if (hMenu != IntPtr.Zero)
-            {
-                EnableMenuItem(hMenu, SC_CLOSE, MF_BYCOMMAND | (CloseButtonEnabled ? MF_ENABLED : MF_GRAYED));
-            }
-        }
-    }
-    public partial class MainWindow : Window
-    {
-        public MainWindow() => InitializeComponent();
-    }
-}
-```
-NativeMethods.txt
-```EnableMenuItem
-GetSystemMenu
-GetWindowLong
-SetWindowLong
-SC_CLOSE
-WS_MAXIMIZEBOX
-WS_MINIMIZEBOX
-```
----
-最小化・最大化両方禁止した場合は、ボタン自体が消える（Windowsがそういう仕様）
-すでに最大化（最小化）されている状態で、最大化（最小化）を禁止した場合元に戻るべきかどうか。
+歴史的経緯により最小化・最大化は、`SetWindowLong`してください。
+[How do I enable and disable the minimize, maximize, and close buttons in my caption bar? - The Old New Thing](https://devblogs.microsoft.com/oldnewthing/20100604-00/?p=13803)
+[WPF: Disabling or Hiding the Minimize, Maximize or Close Button Of a Window - TechNet Articles - United States (English) - TechNet Wiki](https://social.technet.microsoft.com/wiki/contents/articles/29183.wpf-disabling-or-hiding-the-minimize-maximize-or-close-button-of-a-window.aspx)
+~~コードも書いてみようと思ったんですが、ちゃんとやろうとすると時間がかかりそうなので取り急ぎ情報だけ^^;~~
+参考コードは最初からfalseだった時の手当てがないですね。
+---
+個別設定できたほうが一般向けだろうと思うので３つに分けました（一括切り替えも用意しようかとも思いましたが、バインドするとなると煩雑なので省略）
+[NuGet Gallery | Microsoft.Windows.CsWin32 0.1.619-beta](https://www.nuget.org/packages/Microsoft.Windows.CsWin32/0.1.619-beta)
+[NuGet Gallery | Microsoft.Xaml.Behaviors.Wpf 1.1.39](https://www.nuget.org/packages/Microsoft.Xaml.Behaviors.Wpf/1.1.39)
+```xml
+<Window
+  x:Class="Questions370772.MainWindow"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:Behaviors="http://schemas.microsoft.com/xaml/behaviors"
+  xmlns:local="clr-namespace:Questions370772"
+  Width="800"
+  Height="450">
+  <Behaviors:Interaction.Behaviors>
+    <local:WindowButtonBehavior
+      CloseButtonEnabled="{Binding IsChecked, ElementName=close}"
+      MaximizeButtonEnabled="{Binding IsChecked, ElementName=maximize}"
+      MinimizeButtonEnabled="{Binding IsChecked, ElementName=minimize}" />
+  </Behaviors:Interaction.Behaviors>
+  <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
+    <CheckBox
+      x:Name="minimize"
+      VerticalContentAlignment="Center"
+      Content="最小化ボタンを有効にする" />
+    <CheckBox
+      x:Name="maximize"
+      VerticalContentAlignment="Center"
+      Content="最大化ボタンを有効にする" />
+    <CheckBox
+      x:Name="close"
+      VerticalContentAlignment="Center"
+      Content="閉じるボタンを有効にする" />
+  </StackPanel>
+</Window>
+```
+```cs
+using System;
+using System.Windows;
+using System.Windows.Interop;
+using Microsoft.Xaml.Behaviors;
+using Windows.Win32.Foundation;
+using static Windows.Win32.PInvoke;
+using static Windows.Win32.UI.WindowsAndMessaging.MENU_ITEM_FLAGS;
+using static Windows.Win32.UI.WindowsAndMessaging.WINDOW_LONG_PTR_INDEX;
+using static Windows.Win32.UI.WindowsAndMessaging.WINDOW_STYLE;
+namespace Questions370772
+{
+    public class WindowButtonBehavior : Behavior<Window>
+    {
+        public bool MinimizeButtonEnabled { get => (bool)GetValue(MinimizeButtonEnabledProperty); set => SetValue(MinimizeButtonEnabledProperty, value); }
+        public static readonly DependencyProperty MinimizeButtonEnabledProperty
+            = DependencyProperty.Register(nameof(MinimizeButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
+                new PropertyMetadata(true, new PropertyChangedCallback(OnMinimizeButtonEnabledChanged)));
+        private static void OnMinimizeButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+            => (d as WindowButtonBehavior)?.OnMinimizeButtonEnabledChanged();
+        public bool MaximizeButtonEnabled { get => (bool)GetValue(MaximizeButtonEnabledProperty); set => SetValue(MaximizeButtonEnabledProperty, value); }
+        public static readonly DependencyProperty MaximizeButtonEnabledProperty
+            = DependencyProperty.Register(nameof(MaximizeButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
+                new PropertyMetadata(true, new PropertyChangedCallback(OnMaximizeButtonEnabledChanged)));
+        private static void OnMaximizeButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+            => (d as WindowButtonBehavior)?.OnMaximizeButtonEnabledChanged();
+        public bool CloseButtonEnabled { get => (bool)GetValue(CloseButtonEnabledProperty); set => SetValue(CloseButtonEnabledProperty, value); }
+        public static readonly DependencyProperty CloseButtonEnabledProperty
+            = DependencyProperty.Register(nameof(CloseButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
+                new PropertyMetadata(true, new PropertyChangedCallback(OnCloseButtonEnabledChanged)));
+        private static void OnCloseButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+            => (d as WindowButtonBehavior)?.OnCloseButtonEnabledChanged();
+        private IntPtr hwnd;
+        protected override void OnAttached()
+            => AssociatedObject.SourceInitialized += AssociatedObject_SourceInitialized;
+        private void AssociatedObject_SourceInitialized(object? sender, EventArgs e)
+        {
+            AssociatedObject.SourceInitialized -= AssociatedObject_SourceInitialized;
+            hwnd = new WindowInteropHelper(AssociatedObject).Handle;
+            if (!MinimizeButtonEnabled) OnMinimizeButtonEnabledChanged();
+            if (!MaximizeButtonEnabled) OnMaximizeButtonEnabledChanged();
+            if (!CloseButtonEnabled) OnCloseButtonEnabledChanged();
+        }
+        private void OnMinimizeButtonEnabledChanged()
+        {
+            if (hwnd == IntPtr.Zero) return;
+            if (MinimizeButtonEnabled)
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) | (int)WS_MINIMIZEBOX);
+            }
+            else
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) & ~(int)WS_MINIMIZEBOX);
+                //if (AssociatedObject.WindowState == WindowState.Minimized)
+                //{
+                //    AssociatedObject.WindowState = WindowState.Normal;
+                //}
+            }
+        }
+        private void OnMaximizeButtonEnabledChanged()
+        {
+            if (hwnd == IntPtr.Zero) return;
+            if (MaximizeButtonEnabled)
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) | (int)WS_MAXIMIZEBOX);
+            }
+            else
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) & ~(int)WS_MAXIMIZEBOX);
+                //if (AssociatedObject.WindowState == WindowState.Maximized)
+                //{
+                //    AssociatedObject.WindowState = WindowState.Normal;
+                //}
+            }
+        }
+        private void OnCloseButtonEnabledChanged()
+        {
+            if (hwnd == IntPtr.Zero) return;
+            var hMenu = GetSystemMenu((HWND)hwnd, false);
+            if (hMenu != IntPtr.Zero)
+            {
+                EnableMenuItem(hMenu, SC_CLOSE, MF_BYCOMMAND | (CloseButtonEnabled ? MF_ENABLED : MF_GRAYED));
+            }
+        }
+    }
+    public partial class MainWindow : Window
+    {
+        public MainWindow() => InitializeComponent();
+    }
+}
+```
+```txt:NativeMethods.txt
+EnableMenuItem
+GetSystemMenu
+GetWindowLong
+SetWindowLong
+SC_CLOSE
+WS_MAXIMIZEBOX
+WS_MINIMIZEBOX
+```
+最小化・最大化両方禁止した場合は、ボタン自体が消える（Windowsがそういう仕様）
+すでに最大化（最小化）されている状態で、最大化（最小化）を禁止した場合元に戻るべきかどうか。
 ２つ目のリンクでは`menuHandle`を使いまわし最後に`DestroyMenu`しろと言っているが、都度取得しないと動作しなかった。`

コード追記

2021/11/24 23:46

投稿

TN8001

スコア10111

answer CHANGED Viewed

@@ -5,8 +5,175 @@
 [WPF: Disabling or Hiding the Minimize, Maximize or Close Button Of a Window - TechNet Articles - United States (English) - TechNet Wiki](https://social.technet.microsoft.com/wiki/contents/articles/29183.wpf-disabling-or-hiding-the-minimize-maximize-or-close-button-of-a-window.aspx)
-コードも書いてみようと思ったんですが、ちゃんとやろうとすると時間がかかりそうなので取り急ぎ情報だけ^^;
+~~コードも書いてみようと思ったんですが、ちゃんとやろうとすると時間がかかりそうなので取り急ぎ情報だけ^^;~~
 ---
-参考コードは最初からfalseだった時の手当てがないですね。
+参考コードは最初からfalseだった時の手当てがないですね。
+---
+個別設定できたほうが一般向けだろうと思うので３つに分けました（一括切り替えも用意しようかとも思いましたが、バインドするとなると煩雑なので省略）
+[NuGet Gallery | Microsoft.Windows.CsWin32 0.1.619-beta](https://www.nuget.org/packages/Microsoft.Windows.CsWin32/0.1.619-beta)
+[NuGet Gallery | Microsoft.Xaml.Behaviors.Wpf 1.1.39](https://www.nuget.org/packages/Microsoft.Xaml.Behaviors.Wpf/1.1.39)
+```xaml
+<Window
+  x:Class="Questions370772.MainWindow"
+  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+  xmlns:Behaviors="http://schemas.microsoft.com/xaml/behaviors"
+  xmlns:local="clr-namespace:Questions370772"
+  Width="800"
+  Height="450">
+  <Behaviors:Interaction.Behaviors>
+    <local:WindowButtonBehavior
+      CloseButtonEnabled="{Binding IsChecked, ElementName=close}"
+      MaximizeButtonEnabled="{Binding IsChecked, ElementName=maximize}"
+      MinimizeButtonEnabled="{Binding IsChecked, ElementName=minimize}" />
+  </Behaviors:Interaction.Behaviors>
+  <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
+    <CheckBox
+      x:Name="minimize"
+      VerticalContentAlignment="Center"
+      Content="最小化ボタンを有効にする" />
+    <CheckBox
+      x:Name="maximize"
+      VerticalContentAlignment="Center"
+      Content="最大化ボタンを有効にする" />
+    <CheckBox
+      x:Name="close"
+      VerticalContentAlignment="Center"
+      Content="閉じるボタンを有効にする" />
+  </StackPanel>
+</Window>
+```
+```C#
+using System;
+using System.Windows;
+using System.Windows.Interop;
+using Microsoft.Xaml.Behaviors;
+using Windows.Win32.Foundation;
+using static Windows.Win32.PInvoke;
+using static Windows.Win32.UI.WindowsAndMessaging.MENU_ITEM_FLAGS;
+using static Windows.Win32.UI.WindowsAndMessaging.WINDOW_LONG_PTR_INDEX;
+using static Windows.Win32.UI.WindowsAndMessaging.WINDOW_STYLE;
+namespace Questions370772
+{
+    public class WindowButtonBehavior : Behavior<Window>
+    {
+        public bool MinimizeButtonEnabled { get => (bool)GetValue(MinimizeButtonEnabledProperty); set => SetValue(MinimizeButtonEnabledProperty, value); }
+        public static readonly DependencyProperty MinimizeButtonEnabledProperty
+            = DependencyProperty.Register(nameof(MinimizeButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
+                new PropertyMetadata(true, new PropertyChangedCallback(OnMinimizeButtonEnabledChanged)));
+        private static void OnMinimizeButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+            => (d as WindowButtonBehavior)?.OnMinimizeButtonEnabledChanged();
+        public bool MaximizeButtonEnabled { get => (bool)GetValue(MaximizeButtonEnabledProperty); set => SetValue(MaximizeButtonEnabledProperty, value); }
+        public static readonly DependencyProperty MaximizeButtonEnabledProperty
+            = DependencyProperty.Register(nameof(MaximizeButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
+                new PropertyMetadata(true, new PropertyChangedCallback(OnMaximizeButtonEnabledChanged)));
+        private static void OnMaximizeButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+            => (d as WindowButtonBehavior)?.OnMaximizeButtonEnabledChanged();
+        public bool CloseButtonEnabled { get => (bool)GetValue(CloseButtonEnabledProperty); set => SetValue(CloseButtonEnabledProperty, value); }
+        public static readonly DependencyProperty CloseButtonEnabledProperty
+            = DependencyProperty.Register(nameof(CloseButtonEnabled), typeof(bool), typeof(WindowButtonBehavior),
+                new PropertyMetadata(true, new PropertyChangedCallback(OnCloseButtonEnabledChanged)));
+        private static void OnCloseButtonEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+            => (d as WindowButtonBehavior)?.OnCloseButtonEnabledChanged();
+        private IntPtr hwnd;
+        protected override void OnAttached()
+            => AssociatedObject.SourceInitialized += AssociatedObject_SourceInitialized;
+        private void AssociatedObject_SourceInitialized(object? sender, EventArgs e)
+        {
+            AssociatedObject.SourceInitialized -= AssociatedObject_SourceInitialized;
+            hwnd = new WindowInteropHelper(AssociatedObject).Handle;
+            if (!MinimizeButtonEnabled) OnMinimizeButtonEnabledChanged();
+            if (!MaximizeButtonEnabled) OnMaximizeButtonEnabledChanged();
+            if (!CloseButtonEnabled) OnCloseButtonEnabledChanged();
+        }
+        private void OnMinimizeButtonEnabledChanged()
+        {
+            if (hwnd == IntPtr.Zero) return;
+            if (MinimizeButtonEnabled)
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) | (int)WS_MINIMIZEBOX);
+            }
+            else
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) & ~(int)WS_MINIMIZEBOX);
+                //if (AssociatedObject.WindowState == WindowState.Minimized)
+                //{
+                //    AssociatedObject.WindowState = WindowState.Normal;
+                //}
+            }
+        }
+        private void OnMaximizeButtonEnabledChanged()
+        {
+            if (hwnd == IntPtr.Zero) return;
+            if (MaximizeButtonEnabled)
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) | (int)WS_MAXIMIZEBOX);
+            }
+            else
+            {
+                SetWindowLong((HWND)hwnd, GWL_STYLE, GetWindowLong((HWND)hwnd, GWL_STYLE) & ~(int)WS_MAXIMIZEBOX);
+                //if (AssociatedObject.WindowState == WindowState.Maximized)
+                //{
+                //    AssociatedObject.WindowState = WindowState.Normal;
+                //}
+            }
+        }
+        private void OnCloseButtonEnabledChanged()
+        {
+            if (hwnd == IntPtr.Zero) return;
+            var hMenu = GetSystemMenu((HWND)hwnd, false);
+            if (hMenu != IntPtr.Zero)
+            {
+                EnableMenuItem(hMenu, SC_CLOSE, MF_BYCOMMAND | (CloseButtonEnabled ? MF_ENABLED : MF_GRAYED));
+            }
+        }
+    }
+    public partial class MainWindow : Window
+    {
+        public MainWindow() => InitializeComponent();
+    }
+}
+```
+NativeMethods.txt
+```EnableMenuItem
+GetSystemMenu
+GetWindowLong
+SetWindowLong
+SC_CLOSE
+WS_MAXIMIZEBOX
+WS_MINIMIZEBOX
+```
+---
+最小化・最大化両方禁止した場合は、ボタン自体が消える（Windowsがそういう仕様）
+すでに最大化（最小化）されている状態で、最大化（最小化）を禁止した場合元に戻るべきかどうか。
+２つ目のリンクでは`menuHandle`を使いまわし最後に`DestroyMenu`しろと言っているが、都度取得しないと動作しなかった。`