合约：合约就像一个或多个程序之间的协议。合约定义了应用程序在与其它程序或Windows 进行交互时必须遵循的一些约定。我们对一个应用的一些设置，常用的可以放到AppBar上面，如果不是很常用的，比如应用程序的主题颜色，可以放到设置合约，也就是通过超级菜单调出来的设置面板上。下面就介绍如何把我们的设置选项添加的设置面板中。,The agreement between the contract: contract like one or more programs. The contract defines some conventions that must be followed when the applications to interact with other programs or Windows. Some settings of an application, we used to on the AppBar above, if it is not very common, such as the theme color of the application, you can put set contract, that is, by the super the menu tune out the settings panel. The following describes how we set the option to add the settings panel.