用VB.net做的自定义绘图板。-using VB.net do custom graphics board.

基于vb.net的autocad二次开发用程序代码配置并渲染图形，用程序代码配置材质，光源和渲染图形-Vb.net based on secondary development of autocad code used to configure and rendering graphics, with program code configuration materials, light sources and rendering graphics

autoCAD向vct格式的数据进行转换形成vct文件，然后vct向autoCAD格式的数据进行转换，并在CAD中绘出图形-autoCAD to vct data format conversion vct document form, and then to the vct data autoCAD format conversion, and graphics in the CAD drawing of