对话框中实现自动弹出按钮，按钮有弹出菜单功能，可移植到相关界面开发-Dialog box automatically eject button, the button with pop-up menu function, transplanted to the relevant interface development

本文通过改变背景图的实例，介绍一种实现托盘上弹出右击菜单的方法-This paper to change the background image, introduces a way to eject the right-click menu on the tray

QT 5.1界面编程入门范例。Hello world。里面包含三个例子：1. 最简单的hello world程序；2. 添加退出按钮；3. 信号和槽的简单互动-QT 5.1 interface programming entry model. Hello world. Which contains three examples: 1. Most simple hello world program 2. Added eject button 3 simple interactive sign