EINVAL — You passed an invalid argument to the function.

EINVAL：向函数传递了无效的参数。

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Description: an invalid argument (for example, an argument that specified an invalid level) was supplied to the setsockopt (Wsapiref_94aa.asp) function.

说明：一个无效参数(而是例如的参数指定了无效的级别)提供给setsockopt (Wsapiref_94aa . asp)函数。

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Re-examine the argument passed in to the function and determine which argument is invalid.

重新检查参数传递到函数中，确定哪些参数无效。

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