Ïîñêîëüêó îñíîâíóþ èíôîðìàöèþ ñîäåðæèò ñòðóêòóðà DCB, ñ åå îïèñàíèÿ è íà÷íåì:
typedef struct _DCB {{
DWORD DCBlength; // sizeof(DCB)
DWORD BaudRate; // current baud rate
DWORD fBinary:1; // binary mode, no EOF check
DWORD fParity:1; // enable parity checking
DWORD fOutxCtsFlow:1; // CTS output flow control
DWORD fOutxDsrFlow:1; // DSR output flow control
DWORD fDtrControl:2; // DTR flow control type
DWORD fDsrSensitivity:1; // DSR sensitivity
DWORD fTXContinueOnXoff:1; // XOFF continues Tx
DWORD fOutX:1; // XON/XOFF out flow control
DWORD fInX:1; // XON/XOFF in flow control
DWORD fErrorChar:1; // enable error replacement
DWORD fNull:1; // enable null stripping
DWORD fRtsControl:2; // RTS flow control
DWORD fAbortOnError:1; // abort reads/writes on error
DWORD fDummy2:17; // reserved
WORD wReserved; // not currently used
WORD XonLim; // transmit XON threshold
WORD XoffLim; // transmit XOFF threshold
BYTE ByteSize; // number of bits/byte, 4-8
BYTE Parity; // 0-4=no,odd,even,mark,space
BYTE StopBits; // 0,1,2 = 1, 1.5, 2
char XonChar; // Tx and Rx XON character
char XoffChar; // Tx and Rx XOFF character
char ErrorChar; // error replacement character
char EofChar; // end of input character
char EvtChar; // received event character
WORD wReserved1; // reserved; do not use
} DCB;
Åñëè âíèìàòåëüíî ïðèñìîòðåòüñÿ, òî ìîæíî çàìåòèòü, ÷òî ýòà ñòðóêòóðà ñîäåðæèò ïî÷òè âñþ óïðàâëÿþùóþ èíôîðìàöèþ, êîòîðàÿ â ðåàëüíîñòè ðàñïîëàãàåòñÿ â ðàçëè÷íûõ ðåãèñòðàõ ïîñëåäîâàòåëüíîãî ïîðòà.