Hi:
In msdn,the input parameter of IOCTL_SERIAL_SET_HANDFLOW ioctl code is
SERIAL_HANDFLOW,whose definition is :
typedef struct _SERIAL_HANDFLOW {
ULONG ControlHandShake;
ULONG FlowReplace;
LONG XonLimit;
LONG XoffLimit;
} SERIAL_HANDFLOW,*PSERIAL_HANDFLOW
There are also some masks in ntddser.h
#define SERIAL_DTR_MASK ((ULONG)0x03)
#define SERIAL_DTR_CONTROL ((ULONG)0x01)
#define SERIAL_DTR_HANDSHAKE ((ULONG)0x02)
#define SERIAL_CTS_HANDSHAKE ((ULONG)0x08)
#define SERIAL_DSR_HANDSHAKE ((ULONG)0x10)
#define SERIAL_DCD_HANDSHAKE ((ULONG)0x20)
#define SERIAL_OUT_HANDSHAKEMASK ((ULONG)0x38)
#define SERIAL_DSR_SENSITIVITY ((ULONG)0x40)
#define SERIAL_ERROR_ABORT ((ULONG)0x80000000)
#define SERIAL_CONTROL_INVALID ((ULONG)0x7fffff84)
#define SERIAL_AUTO_TRANSMIT ((ULONG)0x01)
#define SERIAL_AUTO_RECEIVE ((ULONG)0x02)
#define SERIAL_ERROR_CHAR ((ULONG)0x04)
#define SERIAL_NULL_STRIPPING ((ULONG)0x08)
#define SERIAL_BREAK_CHAR ((ULONG)0x10)
#define SERIAL_RTS_MASK ((ULONG)0xc0)
#define SERIAL_RTS_CONTROL ((ULONG)0x40)
#define SERIAL_RTS_HANDSHAKE ((ULONG)0x80)
#define SERIAL_TRANSMIT_TOGGLE ((ULONG)0xc0)
#define SERIAL_XOFF_CONTINUE ((ULONG)0x80000000)
#define SERIAL_FLOW_INVALID ((ULONG)0x7fffff20)
I don’t know which member of DCB corresponds to the lines in bold above.(SERIAL_AUTO_TRANSMIT and SERIAL_AUTO_RECEIVE).
Thank you
Regards
Paul