winform最小化及添加右键

        private void PrintService_SizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Hide();
                this.notifyIcon.Visible = true;
            }
        }

        private void PrintService_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("是否关闭服务", "确认", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.No)
                e.Cancel = true;
        }

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("是否确认退出程序？", "退出", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
            {
                // 关闭所有的线程
                this.Dispose();
                this.Close();
            }
        }

        private void 显示ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Show();
                this.ShowInTaskbar = true;
                this.WindowState = FormWindowState.Normal;
                notifyIcon.Visible = false;
            }
        }

参考：http://www.cnblogs.com/nangong/p/997995dc3743b60baac30899c3d82ef7.html

http://www.cnblogs.com/_zjl/archive/2011/05/16/2047918.html             WinForm中实现最小化到系统托盘
http://www.cnblogs.com/xugang/archive/2007/12/19/1006005.html      C#实现WinForm窗口最小化到系统托盘