将自定义上下文菜单项添加到Windows窗体标题栏

我在MSDN上找到了一个线程 ,它显示了如何将项添加到winform标题栏的上下文菜单中。 不幸的是,它没有显示如何使用自定义菜单项注册事件,我一直无法弄清楚如何做到这一点。 下面是一个示例应用程序,可以将其复制并粘贴到新的Windows窗体应用程序中。 如果有人可以为我完成样品,我将不胜感激。 谢谢

using System; using System.Runtime.InteropServices; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); IntPtr hMenu = GetSystemMenu(Handle, false); if (hMenu != IntPtr.Zero) { var menuInfo = new MENUITEMINFO { cbSize = (uint) Marshal.SizeOf(typeof (MENUITEMINFO)), cch = 255, dwTypeData = "Test Item", fMask = 0x1 | 0x2 | 0x10, fState = 0, fType = 0x0 }; InsertMenuItem(hMenu, 0, true, ref menuInfo); DrawMenuBar(Handle); } } [DllImport("user32.dll")] static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert); [DllImport("user32.dll")] static extern bool DrawMenuBar(IntPtr hWnd); [DllImport("user32.dll")] static extern bool InsertMenuItem(IntPtr hMenu, uint uItem, bool fByPosition, [In] ref MENUITEMINFO lpmii); [StructLayout(LayoutKind.Sequential)] public struct MENUITEMINFO { public uint cbSize; public uint fMask; public uint fType; public uint fState; public uint wID; public IntPtr hSubMenu; public IntPtr hbmpChecked; public IntPtr hbmpUnchecked; public IntPtr dwItemData; public string dwTypeData; public uint cch; public IntPtr hbmpItem; } } } 

您必须覆盖WndProc方法并拦截新菜单的ID。

试试这个

 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace WindowsFormsApplication11 { public partial class Form1 : Form { public const Int32 WM_SYSCOMMAND = 0x112; public const Int32 MF_BYPOSITION = 0x400; public const Int32 MYMENU1 = 1000; public const Int32 MUMENU2 = 1001; [DllImport("user32.dll")] private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert); [DllImport("user32.dll")] private static extern bool InsertMenu(IntPtr hMenu,Int32 wPosition, Int32 wFlags, Int32 wIDNewItem,string lpNewItem); public Form1() { InitializeComponent(); } protected override void WndProc(ref Message msg) { if (msg.Msg == WM_SYSCOMMAND) { switch (msg.WParam.ToInt32()) { case MYMENU1: MessageBox.Show("Hi from My Menu 1¡¡¡¡"); return; case MUMENU2: MessageBox.Show("Hi from My Menu 2¡¡¡¡"); return; default: break; } } base.WndProc(ref msg); } private void Form1_Load(object sender, EventArgs e) { IntPtr MenuHandle = GetSystemMenu(this.Handle, false); InsertMenu(MenuHandle, 5, MF_BYPOSITION, MYMENU1, "My Menu 1"); InsertMenu(MenuHandle, 6, MF_BYPOSITION, MUMENU2, "My Menu 2"); } } } 

对于分隔符,只需添加:

 public const Int32 MF_SEPARATOR = 0x800; 

并在Form_load中:

 InsertMenu(MenuHandle, 7, MF_BYPOSITION | MF_SEPARATOR, 0, string.Empty); // <-- Add a menu seperator 

我继续前进,只是在示例代码中添加了必要的元素来注册WndProc。 这回答了注册WndProc的基本问题,而不像以前的解决方案那样改变代码。 (它将添加的菜单保留在系统菜单的顶部)。

 using System; using System.Runtime.InteropServices; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); IntPtr hMenu = GetSystemMenu(Handle, false); if (hMenu != IntPtr.Zero) { var menuInfo = new MENUITEMINFO { cbSize = (uint)Marshal.SizeOf(typeof(MENUITEMINFO)), cch = 255, dwTypeData = "Test Item", fMask = 0x1 | 0x2 | 0x10, fState = 0, // Add an ID for your Menu Item wID = 0x1, fType = 0x0 }; InsertMenuItem(hMenu, 0, true, ref menuInfo); DrawMenuBar(Handle); } } [DllImport("user32.dll")] static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert); [DllImport("user32.dll")] static extern bool DrawMenuBar(IntPtr hWnd); [DllImport("user32.dll")] static extern bool InsertMenuItem(IntPtr hMenu, uint uItem, bool fByPosition, [In] ref MENUITEMINFO lpmii); [StructLayout(LayoutKind.Sequential)] public struct MENUITEMINFO { public uint cbSize; public uint fMask; public uint fType; public uint fState; public uint wID; public IntPtr hSubMenu; public IntPtr hbmpChecked; public IntPtr hbmpUnchecked; public IntPtr dwItemData; public string dwTypeData; public uint cch; public IntPtr hbmpItem; } // Add ID for the Menu private const int WM_SYSCOMMAND = 0x112; // Event method for the Menu protected override void WndProc(ref Message m) { base.WndProc(ref m); //m.WParam = the wID you gave the Menu Item if ((m.Msg == WM_SYSCOMMAND) && ((int)m.WParam == 0x1)) { MessageBox.Show("Test Item Dialog"); } } } 

}