关闭程序时出现operation valid only when the port is open

beijin58 2017-04-21 02:56:53

MFC程序，一开始是用VC6建立的，已经有一个MSCOMM 控件，后来升级到VS2010，并且又多加了一个MSCOMM控件。关闭程序时提示operation valid only when the port is open。然后把串口部分的代码屏蔽了，还是提示；再把后来添加的MSCOMM控件删掉，还是有提示，请问是什么问题呢？，，，，没有分了，大家有空帮忙分析一下吧，多谢了

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qq_29726905 2017-12-19

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