National Instruments PCI-8430 - Page 115

(LPDWORD)&l_ByteCount,
NULL
);
4. ToretrievethecurrentRS-485biasresistormode,youcanuse
NISERIAL_GET_RS485_BIASandDeviceIoControlwiththe
followingcode:
SERIAL_RS485_BIASl_SerialRs485Bias;
DWORDl_ByteCount;
DeviceIoControl(
PortHandle,
NISERIAL_GET_RS485_BIAS,
(LPVOID)NULL,
0,
(LPVOID)&l_SerialRs485Bias,
sizeof(l_SerialRs485Bias),
(LPDWORD)&l_ByteCount,
NULL
);