二维码的VB程序实现，包括编码程序和译码程序，可用于二维码二次开发，源码值得学习。-VB program to achieve two-dimensional code, including the encoder and decoder program can be used for the secondary development of two-dimensional code, source code is worth studying.

CAD二次开发范例（VB）完整的CAD二次开发的源文件 在VB6.0上运行通过的完整代码-CAD secondary development paradigm (VB) a complete CAD secondary development of the source files VB6.0 run through the complete code

中国地图，包含所有地级城市，用vb开发，可进行二次编辑。-Map of China, including all prefecture-level cities, with the vb development, can be secondary editing.

这是一款可用于VB、VC++的CAD绘图OCX控件，文件不大，却具备通用平面CAD功能，方便的处理各种矢量图形，并提供交换文件及二次开发接口。适用于CAD/GIS等图形相关的软件开发。-This is a can be used for VB, VC++ CAD OCX drawing control, file is small, but with the general plane CAD function, convenient to deal with all kinds of vect