graphics.h的源文件，TC中的头文件，但VC编程中需要用到，特别是做图像绘制时就是 VC 方便的开发平台和 TC 简单的绘图功能。-graphics.h the source file, TC in the header file, but need to use VC programming, especially when doing image rendering is a convenient development platform and VC TC simple graph