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