On the design of software, in the windows environment, this paper realizes the DIY of software in the design method of modularization structure by the development tool of C++ Builder, which materializes the basic idea of open system structure.

• 在软件设计上，利用windows平台，以C++builder为开发工具，采用模块化结构设计，以实现软件的DIY。 也体现了数控系统开放性的基本思想。