上图Framewin窗口控件中绿色部分是Client区域即客户区,以下是emwin说明书关于Framewin及其Client区的说明: The frame. window actually consists of 2 windows;the main window and a child window.The child window is called Client window. Itis important to be aware of this when dealing with callback functions: Thereare 2 windows with 2 different callback functions. When creating child windows,these child windows are typically created as children of the client window;their parent is therefor the client window. Framewin窗口控件实际上包含2个窗口:主窗口和子窗口,子窗口称为Client窗口,在处理回调函数时理解主窗口和Client窗口的概念是很重要的:两个窗口可以对应两个不同的回调函数;当创建例如按键、编辑框等控件时,这些控件是作为Client窗口的子控件包含在Client窗口中的,因此这些控件的父窗口是Client窗口而非主窗口。