WPF 默认菜单答案

【问题标题】：WPF Default menuWPF 默认菜单
【发布时间】：2016-02-14 10:48:09
【问题描述】：

我有 WPF 应用程序，右键单击 WPF 应用程序的默认菜单（还原、移动、大小、最小化、最大化、关闭 Alt+F4）

我的问题：我想在此菜单中添加关于选项。我能做到吗？

我想在现有菜单中使用并将关于添加到此菜单而不是创建新菜单！

谢谢。

之前：

之后

【问题讨论】：

标签： c# wpf

【解决方案1】：

// P/Invoke constants
private const int WM_SYSCOMMAND = 0x112;
private const int MF_STRING = 0x0;
private const int MF_SEPARATOR = 0x800;

// P/Invoke declarations
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool AppendMenu(IntPtr hMenu, int uFlags, int uIDNewItem, string lpNewItem);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool InsertMenu(IntPtr hMenu, int uPosition, int uFlags, int uIDNewItem, string lpNewItem);

// ID for the About item on the system menu
private int SYSMENU_ABOUT_ID = 0x1;

public MainWindow()
{
    InitializeComponent();
}

protected override void OnSourceInitialized(EventArgs e)
{
    base.OnSourceInitialized(e);
    var source = (HwndSource) PresentationSource.FromVisual(this);
    source.AddHook(WndProc);

    var helper = new WindowInteropHelper(this);
    // Get a handle to a copy of this form's system (window) menu
    IntPtr hSysMenu = GetSystemMenu(helper.Handle, false);

    // Add a separator
    AppendMenu(hSysMenu, MF_SEPARATOR, 0, string.Empty);

    // Add the About menu item
    AppendMenu(hSysMenu, MF_STRING, SYSMENU_ABOUT_ID, "&About…");
}

private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
    // Handle messages...
    // Test if the About item was selected from the system menu
    if ((msg == WM_SYSCOMMAND) && ((int)wParam == SYSMENU_ABOUT_ID))
    {
        MessageBox.Show("Custom About Dialog");
    }

    return IntPtr.Zero;
}

来源：How can I customize the system menu of a Windows Form? 已修改以使其在 WPF 中工作

【讨论】：