Casio IT-2000W manual

Note:

The application must enable the event using the SetCommEventMask function before the GetCommEventMask function records the occurrence of an event. If the communication device event shows a line status error, the application should call the GetCommError function after calling the GetCommEventMask function.

Note on IrDA:

Some of the events are not supported at present. Some of the supported functions will operate only if 9-Wire connection is established or if both 9-Wire and 3-Wire connections are established.

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