学步园

namespace AppendMenu<br /> {<br /> public partial class Form1 : Form<br /> {<br /> public Form1()<br /> {<br /> InitializeComponent();<br /> }</p> <p> [DllImport("user32.dll")]<br /> private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);</p> <p> [DllImport("user32.dll")]<br /> private static extern bool AppendMenu(IntPtr hMenu, Int32 wFlags, Int32 wIDNewItem, string lpNewItem);</p> <p> public const Int32 WM_SYSCOMMAND = 0x112;<br /> public const Int32 MF_SEPARATOR = 0x800;<br /> public const Int32 MF_STRING = 0x0;<br /> public const Int32 IDM_ABOUT = 10000;</p> <p> protected override void WndProc(ref Message m)<br /> {<br /> if (m.Msg == WM_SYSCOMMAND)<br /> switch (m.WParam.ToInt32())<br /> {<br /> case IDM_ABOUT:<br /> MessageBox.Show("您点击了窗体新添加的任务栏菜单","消息");<br /> return;<br /> default:<br /> break;<br /> }<br /> base.WndProc(ref m);<br /> }</p> <p> private void Form1_Load(object sender, EventArgs e)<br /> {<br /> IntPtr sysMenuHandle = GetSystemMenu(this.Handle, false);<br /> AppendMenu(sysMenuHandle, MF_SEPARATOR, 0, string.Empty);//添加一个分隔线<br /> AppendMenu(sysMenuHandle, MF_STRING, IDM_ABOUT, "新菜单");<br /> }</p> <p> }<br /> }