用VB控制的CAD作图，同时VB也可读取CAD图中的信息，如长度，坐标-Using VB to control the CAD drawing

WPF编程的一个控件库，主要用于绘图，如地图。包括画坐标图、坐标设置、坐标转换、绘制常见形状（如矩形、圆等）。-WPF programming a control library, mainly for the graphics, such as maps. Including painting plot coordinates set, coordinate transformation, drawing common shapes (such as rectangles, circles,

提取CAD土中图元的坐标并保存成各种格式的文件-CAD file to extract the coordinates of the soil elements and saved into a variety of formats

通过指定窗口的句柄截图，可遮挡窗口截图，并通过获取鼠标点击图片处的3原色或指定坐标处的3原色，为后台截图分析指定窗口指定位置处的颜色提供便利。