IOCTL_SERIAL_SET_XOFF IOCTL (ntddser.h)

The IOCTL_SERIAL_SET_XOFF request emulates the reception of an XOFF (transmit off) character. The request stops reception of data. If automatic XON/XOFF flow control is not set, then a client must use a subsequent IOCTL_SERIAL_SET_XON request to restart reception of data.

Major code

IRP_MJ_DEVICE_CONTROL

Input buffer

None.

Input buffer length

None.

Output buffer

None.

Output buffer length

None.

Status block

The Information member is set to zero.

The Status member is set to one of the Generic Status Values for Serial Device Control Requests.

Requirements

   
Header ntddser.h (include Ntddser.h)

See also

IOCTL_SERIAL_SET_XON