本实例实现走懂的图形时钟的绘制，首先由DrawClock（）子函数画出表盘，再由gettime（&newtime）检测系统时间，每秒钟调用DrawClock（）更新一次表盘。-The examples were to go to understand the graphics clock drawing, first by DrawClock () Functions to draw the dial, then gettime (& newtime) detection system

显示灰度图像,用系统默认的灰色来显示一副灰度图像,immovie函数将图像的帧转换为电影显示-According to gray image, use the system default gray to display a grayscale image, immovie function transforms the frame of the image display for movies

调用系统函数，实现图像格式转换。VB代码-use system functin,finish image change code.

某控制系统的开环传递函数的分析,绘制系统的闭环根轨迹-An open-loop transfer function of the control system of the analysis of the drawing system of closed loop root locus