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.
Input Buffer Length
Output Buffer Length
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.
|Header||ntddser.h (include Ntddser.h)|