picturebox有的属性基本上都有，扩展的图形方法有： DrawBezier DrawRoundRect DrawCurve DrawPie DrawPolygon DrawCircle DrawLine GetRGB 扩展的图像处理方法主要有： GetPictureData ShowPicture Invert GrayScale Exposal HistGramEqualize LogCalc ExpCalc ClearIsolatePoint Brightness AverageFil

在vb中实现交互式画图，绘制简单2维图形，窗体中点击显示，可改变颜色，线条样式-Implement in vb interactive drawing, draw a simple two-dimensional graphics, forms, click on display, can change the color, line styles