Casio IT-2000W Technical Reference Manual page 117

GetCommError
int GetCommError(idComDev, lpStat)
int idComDev;
COMSTAT FAR *lpStat;
The GetCommError function is used to acquire the last error value and current status of the specified
device. If a communication error occurs, Windows will lock the communication port until the
GetCommError function cancels the error.
< Parameter >
idComDev: Specifies the communication device for which the status is to be checked.
The OpenComm function returns this value.
lpStat: This is a pointer to the COMSTAT structure that receives the device status.
If this parameter is NULL, this function returns the error value.
< Return value >
If the function is terminated normally, the error value of the communication function which called
the specified device most recently is returned.
< Error values >
CE_BREAK
Indicates that the break state is detected. This functions if 9-Wire or 3-Wire
connection is established.
CE_CTSTO Not supported.
CE_DNS Not supported.
CE_DSRTO Not supported.
CE_FRAME Indicates that a framing error is detected. This functions if 9-Wire or 3-Wire
connection is established.
CE_IOE
Not supported.
CE_MODE Not supported.
CE_OOP Not supported.
CE_OVERRUN Indicates that the previous character could not be read before the next character
was received. The previous character will be lost. This functions if 9-Wire or
3-Wire connection is established.
CE_PTO
Not supported.
CE_RLSDTO Not supported.
CE_RXOVER Not supported.
CE_RXPARITY Indicates that a parity error is detected. This functions if 9-Wire or 3-Wire
connection is established.
/* Communication device ID */
/* Address of the device status buffer */
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