DCBINFO (1.2)
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#define INCL_DOSDEVIOCTL
typedef struct _DCBINFO { /* dcbinf */
USHORT usWriteTimeout;
USHORT usReadTimeout;
BYTE fbCtlHndShake;
BYTE fbFlowReplace;
BYTE fbTimeout;
BYTE bErrorReplacementChar;
BYTE bBreakReplacementChar;
BYTE bXONChar;
BYTE bXOFFChar;
} DCBINFO;
The DCBINFO structure holds device-control block information.
Field Description
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usWriteTimeout Specifies the time-out in one-hundredths of a second.
If set to zero, the time-out is 0.01 seconds; if set
to 1, the time-out is 0.02 seconds, and so on.
usReadTimeout Specifies the time-out in one-hundredths of a second.
If set to zero, the time-out is 0.01 seconds; if set
to 1, the time-out is 0.02 seconds, and so on.
fbCtlHndShake Specifies the control and handshaking modes for the
DTR and other signals. It can be a combination of the
following values:
Value Meaning
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MODE_DTR_CONTROL Enable the data-terminal-ready
(DTR) control mode.
MODE_DTR_HANDSHAKE Enable the data-terminal-ready
(DTR) input handshaking mode.
MODE_CTS_HANDSHAKE Enable output handshaking using
the clear-to-send (CTS)
signal.
MODE_DSR_HANDSHAKE Enable output handshaking using
the data-set-ready (DSR)
signal.
MODE_DCD_HANDSHAKE Enable output handshaking using
the data-carrier-detect (DCD)
signal.
MODE_DSR_SENSITIVITY Enable input sensitivity using
the data-set-ready (DSR)
signal.
fbFlowReplace Specifies the flow control and replacement character
modes. It can be a combination of the following
values:
Value Meaning
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MODE_AUTO_TRANSMIT Enable automatic transmit flow
control (XON/XOFF).
MODE_AUTO_RECEIVE Enable automatic receive flow
control (XON/XOFF).
MODE_ERROR_CHAR Enable error replacement
character.
MODE_NULL_STRIPPING Enable null stripping (remove
null bytes).
MODE_BREAK_CHAR Enable break replacement
character.
MODE_RTS_CONTROL Enable the request-to-send
(RTS) control mode.
MODE_RTS_HANDSHAKE Enable the request-to-send
(RTS) input handshaking mode.
MODE_TRANSMIT_TOGGLE Enable toggling on transmit
mode.
fbTimeout Specifies the time-out processing for the device. It
can be a combination of the following values:
Value Meaning
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MODE_NO_WRITE_TIMEOUT Enable write infinite
time-out processing.
MODE_READ_TIMEOUT Enable normal read time-out
processing.
MODE_WAIT_READ_TIMEOUT Enable wait-for-something
read time-out processing.
MODE_NOWAIT_READ_TIMEOUT Enable no-wait read
time-out processing.
bErrorReplacementChar Specifies the error replacement character.
bBreakReplacementChar Specifies the break replacement character.
bXONChar Specifies the transmission on (XON) character.
bXOFFChar Specifies the transmission off (XOFF) character.
See Also
ASYNC_GETDCBINFO, ASYNC_SETDCBINFO
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