用C#开发使用开源二维码源，再加上自己对AUTOCAD的二次开发，生成各类二维码的DWG文件.包括datamatrix 和 qr code棋盘格标定板(Using C# to develop and use the open source two-dimensional code source, together with the secondary development of AUTOCAD, we can generate all kinds of two-dimensional code DWG files, including data matrix and QR code checkerboard calibration board.)