1.給窗體拖一個NotifyIcon控制元件，按下F4，設定其屬性，如圖片屬性

2.用滑鼠選擇窗體，，按下F4，給其新增尺寸變化事件

      /// <summary>
        /// 最小化後需要處理的委託
        /// </summary>
        private void WaitStart_SizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.ShowInTaskbar = false;
                this.notifyIcon.Visible = true;
              
            }
        }

 3.用滑鼠選擇剛才拖入的控制元件，按下F4，給他新增滑鼠雙擊事件

        /// <summary>
        /// 雙擊圖片後需要處理的委託
        /// </summary>
        private void notifyIcon_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
                this.WindowState = FormWindowState.Normal;
            this.Activate();
            this.notifyIcon.Visible = false;
            this.ShowInTaskbar = true;

        }

 4.完成上述過就可以了，執行看一下