IOCTL_SERIAL_SET_DTR IOCTL

Description

The IOCTL_SERIAL_SET_DTR request sets DTR (data terminal ready).

If the handshake flow control of the device is configured to automatically use DTR, a client cannot clear or set DTR.

To clear DTR, a client can use an IOCTL_SERIAL_CLR_DTR request.

Parameters

Major code

Input buffer

None.

Input buffer length

None.

Output buffer

None.

Output buffer length

None.

Input/output buffer

Input/output buffer length

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. A status of STATUS_INVALID_PARAMETER indicates that the handshake flow control of the device is set to automatically use DTR.

See also

IOCTL_SERIAL_CLR_DTR