引用：

1.设置WinForm窗体属性showinTask=false

2.加notifyicon控件notifyIcon1，为控件notifyIcon1的属性Icon添加一个icon图标。

3.添加窗体最小化事件(首先需要添加事件引用)：

this.SizeChanged += new System.EventHandler(this.Form1_SizeChanged);

//上面一行是主窗体InitializeComponent()方法中需要添加的引用

private void Form1_SizeChanged(object sender, EventArgs e) 

{ 

    if(this.WindowState == FormWindowState.Minimized) 

    { 

       this.Hide(); 

       this.notifyIcon1.Visible=true; 

    } 

}

4.添加点击图标事件(首先需要添加事件引用)：

private void notifyIcon1_Click(object sender, EventArgs e) 

{ 

    this.Visible = true; 

    this.WindowState = FormWindowState.Normal; 

    this.notifyIcon1.Visible = false; 

}

5.可以给notifyIcon添加右键菜单：

主窗体中拖入一个ContextMenu控件NicontextMenu，点中控件，在上下文菜单中添加菜单，notifyIcon1的ContextMenu行为中选中NicontextMenu 作为上下文菜单。

this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components); 

this.NicontextMenu = new System.Windows.Forms.ContextMenu(); 

this.menuItem_Hide = new System.Windows.Forms.MenuItem(); 

this.menuItem_Show = new System.Windows.Forms.MenuItem(); 

this.menuItem_Aubot = new System.Windows.Forms.MenuItem(); 

this.menuItem_Exit = new System.Windows.Forms.MenuItem();  

this.notifyIcon1.ContextMenu = this.NicontextMenu; 

this.notifyIcon1.Icon = ((System.Drawing.Icon)(resources.GetObject( "NotifyIcon.Icon "))); 

this.notifyIcon1.Text = " "; 

this.notifyIcon1.Visible = true; 

this.notifyIcon1.DoubleClick += new System.EventHandler(this.notifyIcon1_DoubleClick); 

this.notifyIcon1.Click += new System.EventHandler(this.notifyIcon1_Click);

this.NicontextMenu.MenuItems.AddRange(

    new System.Windows.Forms.MenuItem[]

    { 

          this.menuItem_Hide, 

          this.menuItem_Show, 

          this.menuItem_Aubot, 

          this.menuItem_Exit

    }

);

//     

//       menuItem_Hide 

//     

this.menuItem_Hide.Index = 0; 

this.menuItem_Hide.Text = "隐藏 "; 

this.menuItem_Hide.Click += new System.EventHandler(this.menuItem_Hide_Click); 

//     

//       menuItem_Show 

//     

this.menuItem_Show.Index = 1; 

this.menuItem_Show.Text = "显示 "; 

this.menuItem_Show.Click += new System.EventHandler(this.menuItem_Show_Click); 

//     

//       menuItem_Aubot 

//     

this.menuItem_Aubot.Index = 2; 

this.menuItem_Aubot.Text = "关于 "; 

this.menuItem_Aubot.Click += new System.EventHandler(this.menuItem_Aubot_Click); 

//     

//       menuItem_Exit 

//     

this.menuItem_Exit.Index = 3; 

this.menuItem_Exit.Text = "退出 "; 

this.menuItem_Exit.Click += new System.EventHandler(this.menuItem_Exit_Click);

protected  override  void  OnClosing(CancelEventArgs e) 

{ 

   this.ShowInTaskbar = false; 

   this.WindowState = FormWindowState.Minimized; 

   e.Cancel = true;     

} 

protected  override  void  OnClosing(CancelEventArgs e) 

{ 

   //this.ShowInTaskbar = false; 

   this.WindowState = FormWindowState.Minimized; 

   e.Cancel = true;     

}

private  void  CloseCtiServer() 

{ 

   timer.Enabled = false; 

   DJ160API.DisableCard(); 

   this.NotifyIcon.Visible = false; 

   this.Close(); 

   this.Dispose(); 

   Application.Exit(); 

}

private  void  HideCtiServer() 

{ 

   this.Hide(); 

}

private  void  ShowCtiServer() 

{ 

   this.Show(); 

   this.WindowState = FormWindowState.Normal; 

   this.Activate();

} 

private  void  CtiManiForm_Closing(object sender, System.ComponentModel.CancelEventArgs e) 

{ 

    this.CloseCtiServer(); 

}

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

{ 

    this.ShowCtiServer(); 

}

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

{

}

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

{ 

    this.CloseCtiServer(); 

}

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

{ 

    this.HideCtiServer(); 

}

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

{ 

   if(this.WindowState == FormWindowState.Minimized) 

   { 

      this.HideCtiServer(); 

   } 

}

private  void  notifyIcon1_DoubleClick(object sender,System.EventArgs e) 

{                                                                 

    this.ShowCtiServer(); 

}