National Instruments PCI-8430 - Page 124

SERIAL_DCD_OUTl_SerialDcdOut;
DWORDl_ByteCount;
DeviceIoControl(
PortHandle,
NISERIAL_GET_DCD,
(LPVOID)NULL,
0,
(LPVOID)&l_SerialDcdOut,
sizeof(l_SerialDcdOut),
(LPDWORD)&l_ByteCount,
NULL
);