给窗体的任务栏右键菜单增加项目

给窗体的任务栏右键菜单增加项目
[DllImport("user32.dll")]
private static extern int GetSystemMenu(int hwnd, int bRevert);
[DllImport("user32.dll")]
private static extern int AppendMenu(int hMenu, int Flagsw, int IDNewItem, string lpNewItem);
// get handle to system menu
int menu = GetSystemMenu(this.Handle.ToInt32(), 0);
// add a separator
AppendMenu(menu, 0xA00, 0, null);
// add an item with a unique ID
AppendMenu(menu, 0, 1234, "跳至URL");
AppendMenu(menu, 0, 1235, "关于HTML帮助");

处理事件
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
// WM_SYSCOMMAND is 0x112
if (m.Msg == 0x112)
{
// check for my new menu item ID
if (m.WParam.ToInt32() == 1234)
{
// show About box here
MessageBox.Show("Btn One");
}
if (m.WParam.ToInt32() == 1235)
{
// show About box here
MessageBox.Show("Btn Two");
}
}
}