在系统菜单中添加自定义菜单项

/// </summary>

private void InitializeComponent()

{

//

// Form1

//

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(571, 441);

this.Name = "Form1";

this.Text = "Form1";

this.Load += new System.EventHandler(this.Form1_Load);

}

#endregion

/// <summary>

/// 应用程序的主入口点。

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new Form1());

}

private void Form1_Load(object sender, System.EventArgs e)

{

int m=GetSystemMenu(this.Handle.ToInt32(),0);

AppendMenu(m,0,0,null);

AppendMenu(m,0,901,"C# Menu");

}

protected override void WndProc(ref Message m)

{

base.WndProc (ref m);

if(m.Msg==0x112)

{

if(m.WParam.ToInt32()==901)

{

MessageBox.Show("被Click!");

}

}

}

}

}