These functions take environment, connection, statement, or descriptor handles as input and return the diagnostic information related to the last function call made using that handle.

这些函数以环境句柄、连接句柄、语句句柄或描述符句柄作为输入参数，返回与上一次使用该句柄作出的函数调用相关的诊断信息。

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Programming of the key of PMC and its working process, setting and meaning of the main parameters, the realization of its CNC function and the related connection are introduced.

针对机床结构的不同进行分类叙述，介绍了关键P MC程序的编制及其运作过程，关键参数的设置，其数控功能的实现和一些需要注意的相关连接。

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