zlg 的GUI实例，包括嵌入式系统的窗口、菜单、画圆、直线、椭圆、矩形等。-zlg GUI examples, including the Embedded System window, menu, Circle, a straight line, oval, rectangle, and so on.

使用嵌入式系统的绘图 API 函数。首先，在屏幕上绘制一个圆角矩形和一个整圆。然后，再在屏幕上无闪烁的绘制一个移动的正弦波。-use of Embedded System mapping API function. First, the screen drawing a rectangle and a fillet entire round. And then on the screen without drawing a flicker of movement of sine wave.